NewMarket (NEU) 10-K 15 Feb 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Jan. 31, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	NEWMARKET CORP
Entity Central Index Key	1,282,637
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		11,852,697
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,560,347,159

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 2,049,451	$ 2,140,830	$ 2,335,405	[1]
Cost of goods sold	1,368,690	1,461,774	1,669,982
Gross profit	680,761	679,056	665,423
Selling, general, and administrative expenses	161,112	164,082	163,520
Research, development, and testing expenses	156,959	158,254	139,183
Operating profit	362,690	356,720	362,720
Interest and financing expenses, net	16,785	14,652	16,567
Other income (expense), net	(2,697)	(3,097)	(7,054)
Income before income tax expense	343,208	338,971	339,099
Income tax expense	99,767	100,368	105,844
Net income	$ 243,441	$ 238,603	$ 233,255
Earnings per share - basic and diluted (in dollars per share)	$ 20.54	$ 19.45	$ 18.38
[1]	Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014. Sales to Shell amounted $261 million (11% of consolidated net sales) in 2014. These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 243,441	$ 238,603	$ 233,255
Pension plans and other postretirement benefits:
Prior service credit (cost) arising during the period, net of income tax expense (benefit) of $(286) in 2016 and $13,913 in 2015	(463)	21,855	0
Amortization of prior service cost (credit) included in net periodic benefit cost (income), net of income tax expense (benefit) of $(1,123) in 2016, $(375) in 2015 and $17 in 2014	(1,801)	(629)	(11)
Actuarial net gain (loss) arising during the period, net of income tax expense (benefit) of $(4,409) in 2016, $(2,477) in 2015 and $(31,282) in 2014	(8,102)	(1,331)	(54,473)
Amortization of actuarial net loss (gain) included in net periodic benefit cost (income), net of income tax expense (benefit) of $2,287 in 2016, $3,052 in 2015 and $1,484 in 2014	3,977	5,426	2,728
Settlements and curtailments, net of income tax expense (benefit) of $608 in 2014	0	0	1,126
Amortization of transition obligation (asset) included in net periodic benefit cost (income), net of income tax expense (benefit) of $1 in 2014	0	0	4
Total pension plans and other postretirement benefits	(6,389)	25,321	(50,626)
Foreign currency translation adjustments, net of income tax expense (benefit) of $(895) in 2016, $(71) in 2015 and $(2,220) in 2014	(31,595)	(30,687)	(28,448)
Other comprehensive income (loss)	(37,984)	(5,366)	(79,074)
Comprehensive income	$ 205,457	$ 233,237	$ 154,181

Consolidated Statements Of Com4

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Prior service credit (cost) arising during the period, income tax expense (benefit)	$ (286)	$ 13,913
Amortization of prior service cost (credit) included in net periodic benefit cost, income tax expense (benefit)	(1,123)	(375)	17
Actuarial net gain (loss) arising during the period, income tax expense (benefit)	(4,409)	(2,477)	(31,282)
Amortization of actuarial net loss (gain) included in net periodic benefit cost, income tax expense (benefit)	2,287	3,052	1,484
Settlements and curtailments, income tax expense (benefit)			608
Amortization of transition obligation (asset) included in net periodic benefit cost, income tax expense (benefit)			1
Foreign currency translation adjustments, income tax expense (benefit)	$ (895)	$ (71)	$ (2,220)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 192,154	$ 93,424
Trade and other accounts receivable, net	306,916	287,967
Inventories	311,512	351,631
Prepaid expenses and other current assets	26,301	35,370
Total current assets	836,883	768,392
Property, plant, and equipment, at cost	1,264,957	1,128,989
Less accumulated depreciation and amortization	761,212	726,543
Net property, plant, and equipment	503,745	402,446
Prepaid pension cost	25,800	20,430
Deferred income taxes	29,063	44,729
Intangibles (net of amortization) and goodwill	10,436	10,907
Deferred charges and other assets	10,509	39,345
Total assets	1,416,436	1,286,249
Current liabilities:
Accounts payable	141,869	128,745
Accrued expenses	104,082	99,511
Dividends payable	17,478	17,594
Income taxes payable	17,573	12,773
Other current liabilities	13,588	5,057
Total current liabilities	294,590	263,680
Long-term debt	507,275	490,920
Other noncurrent liabilities	131,320	144,085
Total liabilities	933,185	898,685
Commitments and contingencies
Shareholders’ equity:
Common stock and paid-in capital (without par value; authorized shares - 80,000,000; issued and outstanding - 11,845,972 at December 31, 2016 and 11,948,446 at December 31, 2015)	1,603	0
Accumulated other comprehensive loss	(182,510)	(144,526)
Retained earnings	664,158	532,090
Total shareholders' equity	483,251	387,564
Total liabilities and shareholders' equity	$ 1,416,436	$ 1,286,249

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common stock, no par value
Common stock, authorized shares	80,000,000	80,000,000
Common stock, issued shares	11,845,972	11,948,446
Common stock, outstanding shares	11,845,972	11,948,446

Consolidated Statements Of Shar

Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Balance (in shares) at Dec. 31, 2013		13,099,356
Balance at Dec. 31, 2013	$ 572,448	$ 0	$ (60,086)	$ 632,534
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	233,255			233,255
Other comprehensive income (loss)	(79,074)		(79,074)
Cash dividends	(59,400)			(59,400)
Repurchases of common stock (in shares)		(664,254)
Repurchases of common stock	(248,509)	$ (2,312)		(246,197)
Stock-based compensation (in shares)		11,263
Stock-based compensation	2,321	$ 2,312		9
Balance (in shares) at Dec. 31, 2014		12,446,365
Balance at Dec. 31, 2014	421,041	$ 0	(139,160)	560,201
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	238,603			238,603
Other comprehensive income (loss)	(5,366)		(5,366)
Cash dividends	(70,763)			(70,763)
Repurchases of common stock (in shares)		(501,261)
Repurchases of common stock	(197,851)	$ (3,070)		(194,781)
Tax benefit from stock-based compensation	374	$ 374
Tax withholdings related to stock-based compensation (in shares)		(3,135)
Tax withholdings related to stock-based compensation	(1,199)	$ (3)		(1,196)
Stock-based compensation (in shares)		6,477
Stock-based compensation	$ 2,725	$ 2,699		26
Balance (in shares) at Dec. 31, 2015	11,948,446	11,948,446
Balance at Dec. 31, 2015	$ 387,564	$ 0	(144,526)	532,090
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	243,441			243,441
Other comprehensive income (loss)	(37,984)		(37,984)
Cash dividends	(75,829)			(75,829)
Repurchases of common stock (in shares)		(98,867)
Repurchases of common stock	(35,815)	$ (252)		(35,563)
Tax withholdings related to stock-based compensation (in shares)		(2,582)
Tax withholdings related to stock-based compensation	(1,076)	$ (1,076)		0
Stock-based compensation (in shares)		(1,025)
Stock-based compensation	$ 2,950	$ 2,931		19
Balance (in shares) at Dec. 31, 2016	11,845,972	11,845,972
Balance at Dec. 31, 2016	$ 483,251	$ 1,603	$ (182,510)	$ 664,158

Consolidated Statements Of Sha8

Consolidated Statements Of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 6.40	$ 5.80	$ 4.70

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 93,424	$ 103,003	$ 238,703
Cash flows from operating activities:
Net income	243,441	238,603	233,255
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	44,893	42,265	41,538
Noncash pension and postretirement expense	12,829	22,037	16,751
Deferred income tax expense	19,185	150	8,208
Unrealized (gain) loss on derivative instruments, net	0	(1,656)	2,179
Change in assets and liabilities:
Trade and other accounts receivable, net	(38,231)	7,215	(6,891)
Inventories	14,480	(21,747)	(51,827)
Prepaid expenses	8,790	1,464	404
Accounts payable and accrued expenses	18,455	(8,809)	8,059
Book overdrafts	10,149	(8,241)	2,414
Income taxes payable	7,172	6,856	(4,727)
Cash pension and postretirement contributions	(25,898)	(26,813)	(26,505)
Proceeds from legal settlements	0	0	5,150
Realized loss on derivative instruments, net	4,825	4,877	4,946
Other, net	33,344	11,826	2,004
Cash provided from (used in) operating activities	353,434	268,027	234,958
Cash flows from investing activities:
Capital expenditures	(142,874)	(126,499)	(59,716)
Deposits for interest rate swap	(7,570)	(16,487)	(10,844)
Return of deposits for interest rate swap	11,832	18,140	8,900
Other, net	(4,749)	(4,877)	(4,946)
Cash provided from (used in) investing activities	(143,361)	(129,723)	(66,606)
Cash flows from financing activities:
Net borrowings under revolving credit facility	11,000	131,000	14,000
Dividends paid	(75,829)	(70,763)	(59,400)
Repurchases of common stock	(35,815)	(194,924)	(248,509)
Other, net	(2,733)	(791)	(1,461)
Cash provided from (used in) financing activities	(103,377)	(135,478)	(295,370)
Effect of foreign exchange on cash and cash equivalents	(7,966)	(12,405)	(8,682)
Increase (decrease) in cash and cash equivalents	98,730	(9,579)	(135,700)
Cash and cash equivalents at end of year	$ 192,154	$ 93,424	$ 103,003

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Consolidation —Our consolidated financial statements include the accounts of NewMarket Corporation and its subsidiaries. All intercompany transactions are eliminated upon consolidation. References to "we," "us," "our," the "company," and "NewMarket" are to NewMarket Corporation and its consolidated subsidiaries, unless the context indicates otherwise. NewMarket is the parent company of three operating companies, each managing its own assets and liabilities. Those companies are Afton, which focuses on petroleum additive products; Ethyl, representing certain contracted manufacturing and services, as well as the TEL business; and NewMarket Development, which manages the property and improvements that we own in Virginia. NewMarket is also the parent company of NewMarket Services, which provides various administrative services to NewMarket, Afton, Ethyl, and NewMarket Development. Certain reclassifications have been made to the accompanying consolidated financial statements and the related notes to conform to the current presentation. Foreign Currency Translation —We translate the balance sheets of our foreign subsidiaries into U.S. Dollars based on the current exchange rate at the end of each period. We translate the statements of income using the weighted-average exchange rates for the period. NewMarket includes translation adjustments in the Consolidated Balance Sheets as part of accumulated other comprehensive loss and transaction adjustments in the Consolidated Statements of Income as part of cost of goods sold. Foreign currency transaction adjustments resulted in a net gain of $5 million in 2016 , and a net loss of $11 million in 2015 , and $4 million in 2014 . Revenue Recognition —Our policy is to recognize revenue from the sale of products when title and risk of loss have transferred to the buyer, the price is fixed and determinable, and collectability is reasonably assured. Net sales (revenues) are reported at the gross amount billed, including amounts related to shipping that are charged to the customer. Provisions for rebates to customers are recorded in the same period that the related sales are recorded. Freight costs incurred on the delivery of products are included in the Consolidated Statements of Income in cost of goods sold. Our standard terms of delivery are included in our contracts, sales order confirmation documents, and invoices. Taxes assessed by a governmental authority concurrent with sales to our customers, including sales, use, value-added, and revenue-related excise taxes, are not included as net sales, but are reflected in accrued expenses until remitted to the appropriate governmental authority. Cash and Cash Equivalents —Our cash equivalents consist of government obligations and commercial paper with original maturities of 90 days or less. Throughout the year, we have cash balances in excess of federally insured amounts on deposit with various financial institutions. We state cash and cash equivalents at cost, which approximates fair value. Accounts Receivable —We record our accounts receivable at net realizable value. We maintain an allowance for doubtful accounts for estimated losses resulting from our customers not making required payments. We determine the adequacy of the allowance by periodically evaluating each customer’s receivable balance, considering their financial condition and credit history, and considering current economic conditions. The allowance for doubtful accounts was not material at December 31, 2016 or December 31, 2015 . Inventories —NewMarket values its petroleum additives and TEL inventories at the lower of cost or net realizable value. In the United States, cost is determined on the last-in, first-out (LIFO) basis. In all other countries, we determine cost using the weighted-average method. Inventory cost includes raw materials, direct labor, and manufacturing overhead. Property, Plant, and Equipment —We state property, plant, and equipment at cost and compute depreciation by the straight-line method based on the estimated useful lives of the assets. We capitalize expenditures for significant improvements that extend the useful life of the related property. We expense repairs and maintenance, including plant turnaround costs, as incurred. When property is sold or retired, we remove the cost and accumulated depreciation from the accounts and any related gain or loss is included in earnings. Intangibles (Net of Amortization) and Goodwill —Identifiable intangibles include the cost of acquired contracts, formulas and technology, trademarks and trade names, and customer bases. We assign a value to identifiable intangibles based on independent third-party appraisals and management's assessment at the time of acquisition. NewMarket amortizes the cost of the customer bases by an accelerated method and the cost of the remaining identifiable intangibles by the straight-line method over the estimated economic life of the intangible. Goodwill arises from the excess of cost over net assets of businesses acquired. Goodwill represents the residual purchase price after allocation to all identifiable net assets. We test goodwill for impairment each year, as well as whenever a significant event or circumstance occurs which could reduce the fair value of the reporting unit to which the goodwill applies below the carrying amount of the reporting unit. Impairment of Long-Lived Assets —When significant events or circumstances occur that might impair the value of long-lived assets, we evaluate recoverability of the recorded cost of these assets. Assets are considered to be impaired if their carrying amount is not recoverable from the estimated undiscounted future cash flows associated with the assets. If we determine an asset is impaired and its recorded cost is higher than estimated fair market value based on the estimated present value of future cash flows, we adjust the asset to estimated fair market value. Environmental Costs —NewMarket capitalizes environmental compliance costs if they extend the useful life of the related property or prevent future contamination. Environmental compliance costs also include maintenance and operation of pollution prevention and control facilities. We expense these compliance costs in cost of goods sold as incurred. Accrued environmental remediation and monitoring costs relate to an existing condition caused by past operations. NewMarket accrues these costs in current operations within cost of goods sold in the Consolidated Statements of Income when it is probable that we have incurred a liability and the amount can be reasonably estimated. These estimates are based on an assessment of the site, available clean-up methods, and prior experience in handling remediation. When we can reliably determine the amount and timing of future cash flows, we discount these liabilities, incorporating an inflation factor. Legal Costs —We expense legal costs in the period incurred. Employee Savings Plan —Most of our full-time salaried and hourly employees may participate in defined contribution savings plans. Employees who are covered by collective bargaining agreements may also participate in a savings plan according to the terms of their bargaining agreements. Employees, as well as NewMarket, contribute to the plans. We made contributions of $7 million in 2016 , $6 million in 2015 , and $6 million in 2014 related to these plans. Research, Development, and Testing Expenses —NewMarket expenses all research, development, and testing costs as incurred. R&D costs include personnel-related costs, as well as internal and external testing of our products. Income Taxes —We recognize deferred income taxes for temporary differences between the financial reporting basis and the income tax basis of assets and liabilities. We also adjust for changes in tax rates and laws at the time the changes are enacted. A valuation allowance is recorded when it is more likely than not that a deferred tax asset will not be realized. We recognize accrued interest and penalties associated with uncertain tax positions as part of income tax expense on our Consolidated Statements of Income. We generally provide for additional U.S. taxes that would be incurred if a foreign subsidiary returns its earnings in cash to the United States. Undistributed earnings of certain foreign subsidiaries for which U.S. taxes have not been provided totaled approximately $537 million at December 31, 2016 , $436 million at December 31, 2015 , and $363 million at December 31, 2014 . Deferred income taxes have not been provided on these earnings since we expect them to be indefinitely reinvested abroad. Accordingly, no provision has been made for taxes that may be payable on the remittance of these earnings. The determination of the amount of such unrecognized deferred tax liability is not practicable because of the complexities with its hypothetical calculation. Capital Lease Obligation —We record our capital lease obligations at the lower of fair market value of the related asset at the inception of the lease or the present value of the total minimum lease payments. Derivative Financial Instruments and Hedging Activities —We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. We do not enter into derivative instruments for speculative purposes. We had no derivative financial instruments outstanding at December 31, 2016. Stock-based Compensation —We calculate the fair value of restricted stock and restricted stock units based on the closing price of our common stock on the date of grant. If award recipients are entitled to receive dividends during the vesting period, we make no adjustment to the fair value of the award for dividends. If the award does not entitle recipients to dividends during the vesting period, we reduce the grant-date price of our common stock by the present value of the dividends expected to be paid on the underlying shares during the vesting period, discounted at the risk-free interest rate. We recognize stock-based compensation expense for the number of awards expected to vest on a straight-line basis over the requisite service period. Estimates and Risks Due to Concentration of Business —The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. In addition, our financial results can be influenced by certain risk factors. Some of our significant concentrations of risk include the following: • reliance on a small number of significant customers; • customers concentrated in the fuel and lubricant industries; and • production of several of our products solely at one facility.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share We had 18,114 shares in 2016 , 27,434 shares in 2015 , and 30,521 shares in 2014 of nonvested restricted stock and restricted stock units that were excluded from the calculation of diluted earnings per share, as their effect on earnings per share would be anti-dilutive. The nonvested restricted stock is considered a participating security since the restricted stock contains nonforfeitable rights to dividends. As such, we use the two-class method to compute basic and diluted earnings per share for all periods presented since this method yielded a more dilutive result than the treasury-stock method. The following table illustrates the earnings allocation method utilized in the calculation of basic and diluted earnings per share. Years Ended December 31, (in thousands, except per-share amounts) 2016 2015 2014 Earnings per share numerator: Net income attributable to common shareholders before allocation of earnings to participating securities $ 243,441 $ 238,603 $ 233,255 Earnings allocated to participating securities 477 482 391 Net income attributable to common shareholders after allocation of earnings to participating securities $ 242,964 $ 238,121 $ 232,864 Earnings per share denominator: Weighted-average number of shares of common stock outstanding - basic and diluted 11,828 12,241 12,671 Earnings per share - basic and diluted $ 20.54 $ 19.45 $ 18.38

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Years Ended December 31, (in thousands) 2016 2015 2014 Cash paid during the year for Interest and financing expenses (net of capitalization) $ 18,775 $ 16,193 $ 16,223 Income taxes 60,998 99,006 112,289 Supplemental disclosure of non-cash transactions Release of deposit account funds to terminate interest rate swap 21,868 0 0 Non-cash additions to property, plant, and equipment 8,762 13,959 5,933 Non-cash obligation under capital lease 4,810 0 0

Trade and Other Accounts Receiv

Trade and Other Accounts Receivable, Net	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Trade and Other Accounts Receivable, Net	Trade and Other Accounts Receivable, Net December 31, (in thousands) 2016 2015 Trade receivables $ 265,991 $ 252,699 Income tax receivables 26,189 20,141 Other 14,736 15,127 $ 306,916 $ 287,967

Inventories

Inventories	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventories	Inventories December 31, (in thousands) 2016 2015 Finished goods and work-in-process $ 254,068 $ 292,978 Raw materials 45,581 48,728 Stores, supplies, and other 11,863 9,925 $ 311,512 $ 351,631 Our U.S. inventories, which are stated on the LIFO basis, amounted to $130 million at December 31, 2016 , which was below replacement cost by approximately $39 million . At December 31, 2015 , LIFO basis inventories were $147 million , which was approximately $36 million below replacement cost. Our foreign inventories amounted to $176 million at December 31, 2016 and $196 million at December 31, 2015 . Reserves for obsolete and slow-moving inventory included in the table above were not material at December 31, 2016 or December 31, 2015 .

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2016
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid Expenses and Other Current Assets	Prepaid Expenses and Other Current Assets December 31, (in thousands) 2016 2015 Dividend funding $ 17,478 $ 17,594 Income taxes on intercompany profit 3,954 12,310 Other 4,869 5,466 $ 26,301 $ 35,370

Property, Plant, and Equipment,

Property, Plant, and Equipment, at Cost	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment, at Cost	Property, Plant, and Equipment, at Cost December 31, (in thousands) 2016 2015 Land $ 40,190 $ 41,101 Land improvements 44,048 32,074 Leasehold improvements 1,510 1,516 Buildings 161,512 156,555 Machinery and equipment 915,423 774,857 Construction in progress 102,274 122,886 $ 1,264,957 $ 1,128,989 We depreciate the cost of property, plant, and equipment by the straight-line method over the following estimated useful lives: Land improvements 5 - 30 years Buildings 10 - 48 years Machinery and equipment 3 - 20 years Depreciation expense was $42 million in 2016 , $35 million in 2015 , and $34 million in 2014 .

Intangibles (Net of Amortizatio

Intangibles (Net of Amortization) and Goodwill	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Intangibles (Net of Amortization) and Goodwill	Intangibles (Net of Amortization) and Goodwill The net carrying amount of intangibles and goodwill was $10 million at December 31, 2016 and $11 million at December 31, 2015 . The gross carrying amount and accumulated amortization of each type of intangible asset and goodwill are presented in the table below. December 31, 2016 2015 (in thousands) Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortizing intangible assets Formulas and technology $ 2,678 $ 1,958 $ 88,763 $ 86,861 Contracts 2,000 0 4,476 4,103 Customer bases 6,938 3,961 6,977 3,627 Trademarks and trade names 1,513 1,069 1,549 923 Goodwill 4,295 4,656 $ 17,424 $ 6,988 $ 106,421 $ 95,514 Aggregate amortization expense $ 1,860 $ 5,704 Aggregate amortization expense was $6 million in 2014 . All of the intangibles relate to the petroleum additives segment. The change in the gross carrying amount between 2015 and 2016 is due to the following factors: • Certain intangible assets related to formulas and technology and contracts became fully amortized during 2016, resulting in a decrease in the gross carrying amount and accumulated amortization, • A contract renewal related to a non-compete agreement, and • Foreign currency fluctuations. There is no accumulated goodwill impairment. Estimated annual amortization expense related to our intangible assets for the next five years is expected to be (in thousands): 2017 $ 864 2018 834 2019 813 2020 504 2021 440 We amortize the contract over 10 years ; customer bases over 20 years ; formulas and technology over 10 years ; and trademarks and trade names over 10 years .

Deferred Charges and Other Asse

Deferred Charges and Other Assets	12 Months Ended
	Dec. 31, 2016
Other Assets, Noncurrent [Abstract]
Deferred Charges and Other Assets	Deferred Charges and Other Assets December 31, (in thousands) 2016 2015 Asbestos insurance receivables $ 4,147 $ 5,244 Deferred financing costs, net of amortization 1,414 1,914 Interest rate swap deposits 0 26,130 Other 4,948 6,057 $ 10,509 $ 39,345 Deferred financing costs, net of amortization in the table above include only those costs associated with the revolving credit facility. The amount of deferred financing costs, net of amortization related to the 4.10% senior notes is reported as a component of long-term debt. See Note 11 for further information on our long-term debt. We terminated the interest rate swap on September 7, 2016, as discussed in Note 14 .

Accrued Expenses

Accrued Expenses	12 Months Ended
	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Accrued Expenses	Accrued Expenses December 31, (in thousands) 2016 2015 Employee benefits, payroll, and related taxes $ 33,019 $ 30,562 Customer rebates 20,944 21,290 Capital projects 18,779 13,927 Taxes other than income and payroll 6,046 7,216 Other 25,294 26,516 $ 104,082 $ 99,511

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2016
Long-term Debt and Capital Lease Obligations [Abstract]
Long-term Debt	Long-term Debt December 31, (in thousands) 2016 2015 Senior notes - 4.10% due 2022 (net of related deferred financing costs) $ 346,505 $ 345,920 Revolving credit facility 156,000 145,000 Capital lease obligation 4,770 0 $ 507,275 $ 490,920 4.10% Senior Notes – In 2012, we issued $350 million aggregate principal amount of 4.10% senior notes due 2022 at an issue price of 99.83% . The notes are senior unsecured obligations and are registered under the Securities Act of 1933. We incurred financing costs totaling approximately $5 million related to the 4.10% senior notes, which are being amortized over the term of the agreement. The 4.10% senior notes rank: • equal in right of payment with all of our existing and future senior unsecured indebtedness; and • senior in right of payment to any of our future subordinated indebtedness. The indenture governing the 4.10% senior notes contains covenants that, among other things, limit our ability and the ability of our subsidiaries to: • create or permit to exist liens; • enter into sale-leaseback transactions; • incur additional guarantees; and • sell all or substantially all of our assets or consolidate or merge with or into other companies. We were in compliance with all covenants under the indenture governing the 4.10% senior notes as of December 31, 2016 and December 31, 2015 . Revolving Credit Facility – On October 28, 2014, we entered into a Credit Agreement with a term of five years . The Credit Agreement provides for a $650 million , multicurrency revolving credit facility, with a $100 million sublimit for multicurrency borrowings, a $75 million sublimit for letters of credit, and a $20 million sublimit for swingline loans. The Credit Agreement includes an expansion feature which allows us, subject to certain conditions, to request an increase to the aggregate amount of the revolving credit facility or obtain incremental term loans in an amount up to $150 million . We have recorded deferred financing costs of $2.5 million related to the credit facility, which we are amortizing over the term of the Credit Agreement. On July 15, 2016, we entered into Amendment No. 1 to the Credit Agreement. The amendment allows certain of our foreign subsidiaries to borrow under the original Credit Agreement dated as of October 28, 2014. We did not incur significant additional financing fees with the amendment. The obligations under the Credit Agreement are unsecured and fully guaranteed by NewMarket. The revolving credit facility matures on October 28, 2019 . Borrowings made under the revolving credit facility bear interest at an annual rate equal to, at our election, either (1) the ABR plus the Applicable Rate (solely in the case of loans denominated in U.S. dollars to NewMarket) or (2) the Adjusted LIBO Rate plus the Applicable Rate. ABR is the greatest of (i) the rate of interest publicly announced by the Administrative Agent as its prime rate, (ii) the federal funds effective rate plus 0.5% , or (iii) the Adjusted LIBO Rate for a one month interest period plus 1% . The Adjusted LIBO Rate means the rate at which Eurocurrency deposits in the London interbank market for certain periods (as selected by NewMarket) are quoted, as adjusted for statutory reserve requirements. Depending on our consolidated Leverage Ratio, the Applicable Rate ranges from 0.00% to 0.50% for loans bearing interest based on the ABR and from 1.00% to 1.50% for loans bearing interest based on the Adjusted LIBO Rate. At December 31, 2016 , the Applicable Rate was 0.25% for loans bearing interest based on the ABR and 1.25% for loans bearing interest based on the Adjusted LIBO Rate. The Credit Agreement contains financial covenants that require NewMarket to maintain a consolidated Leverage Ratio (as defined in the Credit Agreement) of no more than 3.50 to 1.00 and a consolidated Interest Coverage Ratio (as defined in the Credit Agreement) of no less than 3.00 to 1.00 , calculated on a rolling four quarter basis, as of the end of each fiscal quarter ending on and after December 31, 2014. We were in compliance with all covenants under the revolving credit facility at December 31, 2016 and December 31, 2015 . The following table provides information related to the unused portion of our revolving credit facility in effect at December 31, 2016 and December 31, 2015 : December 31, (in thousands) 2016 2015 Maximum borrowing capacity under the revolving credit facility $ 650,000 $ 650,000 Outstanding borrowings under the revolving credit facility 156,000 145,000 Outstanding letters of credit 3,483 2,895 Unused portion of revolving credit facility $ 490,517 $ 502,105 The average interest rate for borrowings under our revolving credit facilities was 1.9% during both 2016 and 2015 . The average interest rate on outstanding borrowings was 2.1% at December 31, 2016 and December 31, 2015 . Outstanding borrowings for the revolving credit facility are due in 2019. None of our remaining outstanding borrowings at December 31, 2016 are due in the next five years. Capital Lease Obligation – The capital lease obligation is related to the Singapore manufacturing facility. Other Borrowings - On January 4, 2017, we issued $250 million in senior unsecured notes in a private placement with The Prudential Insurance Company of America and certain other purchasers. These notes bear interest at 3.78% and mature on January 4, 2029 . Interest is payable semiannually and principal payments of $50 million are payable annually beginning on January 4, 2025. Under certain conditions, we have the option to prepay the notes. The note purchase agreement contains representations, warranties, terms and conditions customary for transactions of this type. These include negative covenants, certain financial covenants and events of default which are substantially similar to the covenants and events of default in our revolving credit facility.

Other Noncurrent Liabilities

Other Noncurrent Liabilities	12 Months Ended
	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Other Noncurrent Liabilities	Other Noncurrent Liabilities December 31, (in thousands) 2016 2015 Employee benefits $ 81,377 $ 77,413 Environmental remediation 13,796 14,907 Asbestos litigation reserve 9,710 9,571 Deferred income taxes 9,234 9,656 Interest rate swaps 0 19,494 Other 17,203 13,044 $ 131,320 $ 144,085 We terminated the interest rate swap on September 7, 2016, as discussed in Note 14 .

Stock-based Compensation

Stock-based Compensation	12 Months Ended
	Dec. 31, 2016
Share-based Compensation [Abstract]
Stock-based Compensation	Stock-based Compensation The 2014 Incentive Compensation and Stock Plan (the Plan) was approved on April 24, 2014 and replaced the 2004 Incentive Compensation and Stock Plan (the Prior Plan). No new awards may be granted under the Prior Plan, but the terms of the Prior Plan continued to govern awards that were issued under the Prior Plan and remained outstanding. All awards outstanding under the Prior Plan vested or were forfeited during 2016. Any employee of our company or an affiliate or a person who is a member of our Board of Directors or the board of directors of an affiliate is eligible to participate in the Plan if the Compensation Committee of the Board of Directors (the Administrator), in its sole discretion, determines that such person has contributed or can be expected to contribute to the profits or growth of our company or its affiliates (each, a participant). Under the terms of the Plan, we may grant participants stock awards, incentive awards, stock units, or options (which may be either incentive stock options or nonqualified stock options), or stock appreciation rights (SARs), which may be granted with a related option. Stock options entitle the participant to purchase a specified number of shares of our common stock at a price that is fixed by the Administrator at the time the option is granted; provided, however, that the price cannot be less than the shares’ fair market value on the date of grant. The maximum period in which an option may be exercised is fixed by the Administrator at the time the option is granted but, in the case of an incentive stock option, cannot exceed ten years. No participant may be granted or awarded, in any calendar year, shares, options, SARs, or stock units covering more than 200,000 shares of our common stock in the aggregate. For purposes of this limitation and the individual limitation on the grant of options, an option and corresponding SAR are treated as a single award. The maximum aggregate number of shares of our common stock that may be issued under the Plan is 1,000,000 . At December 31, 2016 , 981,067 shares were available for grant. During 2016 , we granted 720 shares to five of our non-employee directors, which vested immediately. A summary of activity during 2016 related to NewMarket’s restricted stock and restricted stock units (stock awards) is presented below in whole shares: Number of Shares Weighted Average Grant-Date Fair Value Unvested stock awards at January 1, 2016 27,434 $ 359.48 Vested in 2016 7,575 314.19 Forfeited in 2016 1,745 351.29 Unvested stock awards at December 31, 2016 18,114 379.22 The weighted average grant-date fair value was $375.57 for stock awards granted in 2015 and $381.99 for stock awards granted in 2014 . The fair value of shares vested was $3 million in 2016 and $4 million in 2015 . We recognized compensation expense of $3 million in 2016 , $2 million in 2015 , and $2 million in 2014 related to stock awards. At December 31, 2016 , total unrecognized compensation expense related to stock awards was $3 million , which is expected to be recognized over a period of 1.7 years .

Derivatives and Hedging Activit

Derivatives and Hedging Activities	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities We are exposed to certain risks arising from both our business operations and economic conditions. We manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage certain economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources, and duration of our debt funding, as well as through the use of derivative financial instruments. Specifically, we have entered, and in the future may enter, into interest rate swaps to manage our exposure to interest rate movements. Our foreign operations expose us to fluctuations of foreign exchange rates. These fluctuations may impact our results of operations, financial position, and cash flows. To manage this exposure, we sometimes enter into foreign currency forward contracts to minimize currency exposure due to cash flows from foreign operations. There were no such contracts outstanding at December 31, 2016 or December 31, 2015 . Non-designated Hedges On June 25, 2009, we entered into an interest rate swap with Goldman Sachs in the notional amount of $97 million and with a maturity date of January 19, 2022 (Goldman Sachs interest rate swap). We terminated this swap, which had been fully collateralized over the period that it was outstanding, on September 7, 2016 and settled the liability using approximately $22 million of the cash deposit with Goldman Sachs. Under the terms of this interest rate swap, NewMarket made fixed rate payments at 5.3075% and Goldman Sachs made variable rate payments based on three-month LIBOR. Until termination, we collateralized this exposure through cash deposits posted with Goldman Sachs amounting to $26 million at December 31, 2015 . We have made an accounting policy election to not offset derivative fair value amounts with the fair value amounts for the right to reclaim cash collateral under our master netting arrangement. We did not use hedge accounting for the Goldman Sachs interest rate swap, and therefore, immediately recognized any change in the fair value of this derivative financial instrument directly in earnings. The table below presents the fair value of our derivative financial instruments, as well as their classification on the Consolidated Balance Sheets. Liability Derivatives December 31, 2016 December 31, 2015 (in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives Not Designated as Hedging Instruments Goldman Sachs interest rate swap Accrued expenses and Other noncurrent liabilities $ 0 Accrued expenses and Other noncurrent liabilities $ 21,734 The following table presents the effect of our derivative financial instruments on the Consolidated Statements of Income. Effect of Derivative Instruments on the Consolidated Statements of Income Not Designated Derivatives (in thousands) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives Years Ended December 31, 2016 2015 2014 Goldman Sachs interest rate swap Other income (expense), net $ (4,883 ) $ (3,221 ) $ (7,125 )

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The following table provides information on assets and liabilities measured at fair value on a recurring basis. No material events occurred during 2016 requiring adjustment to the recognized balances of assets or liabilities which are recorded at fair value on a nonrecurring basis. As discussed in Note 14 , we terminated the interest swap on September 7, 2016 . Carrying Amount in Consolidated Balance Sheets Fair Value Fair Value Measurements Using Level 1 Level 2 Level 3 (in thousands) December 31, 2016 Cash and cash equivalents $ 192,154 $ 192,154 $ 192,154 $ 0 $ 0 December 31, 2015 Cash and cash equivalents $ 93,424 $ 93,424 $ 93,424 $ 0 $ 0 Cash deposit for collateralized interest rate swap 26,130 26,130 26,130 0 0 Interest rate swap liability 21,734 21,734 0 21,734 0 Before the termination of the interest swap, its fair value was determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The analysis reflected the contractual term of the derivative, including the period to maturity. The variable cash payments were based on an expectation of future interest rates derived from observable market interest rate curves. In determining the fair value measurements, we incorporated credit valuation adjustments to appropriately reflect both our nonperformance risk and the counterparties’ nonperformance risk. Although we determined that the majority of the inputs used to value our derivative fell within Level 2 of the fair value hierarchy, the credit valuation adjustment associated with the derivative utilized Level 3 inputs. These Level 3 inputs included estimates of current credit spreads to evaluate the likelihood of default by both us and the counterparties to the derivative. As of December 31, 2015 , we assessed the significance of the impact of the credit valuation adjustment on the overall valuation of our derivative and determined that the credit valuation adjustment was not significant to the overall valuation of the derivative. Accordingly, we determined that our derivative valuation should be classified in Level 2 of the fair value hierarchy. We have made an accounting policy election to measure credit risk of any derivative financial instruments subject to master netting agreements on a net basis by counterparty portfolio. Long-term debt - We record the carrying amount of our long-term debt at historical cost, less deferred financing costs related to the 4.10% senior notes. The estimated fair value of our long-term debt is shown in the table below and is based primarily on estimated current rates available to us for debt of the same remaining duration and adjusted for nonperformance risk and credit risk. The estimated fair value of our publicly traded 4.10% senior notes included in long-term debt in the table below is based on the last quoted price closest to December 31, 2016 . The fair value is categorized as Level 2. December 31, 2016 December 31, 2015 (in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (excluding capital lease obligation) $ 502,505 $ 507,925 $ 490,920 $ 515,302

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Contractual Commitments —NewMarket has operating lease agreements primarily for office space, land, transportation equipment, and storage facilities. Rental expense was $33 million in 2016 , $34 million in 2015 , and $30 million in 2014 . Future lease payments for all noncancelable operating leases as of December 31, 2016 are (in thousands): 2017 $ 14,235 2018 11,698 2019 9,520 2020 6,796 2021 4,776 After 2021 23,515 We have contractual obligations for the construction of assets, as well as purchases of property and equipment, of approximately $52 million at December 31, 2016 , all of which are due within five years . Purchase Obligations —We have purchase obligations for goods or services that are enforceable, legally binding, and specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum, or variable price provisions; and the approximate timing of the transaction. Purchase obligations exclude agreements that are cancelable without penalty. Purchase orders made in the ordinary course of business are excluded from this amount. Any amounts for which we are liable under purchase orders are reflected in our Consolidated Balance Sheets as accounts payable or accrued expenses. Future payments for purchase obligations as of December 31, 2016 are (in thousands): 2017 $ 150,740 2018 163,953 2019 167,368 2020 151,066 2021 148,113 After 2021 239,740 Litigation —We are involved in legal proceedings that are incidental to our business and may include administrative or judicial actions. Some of these legal proceedings involve governmental authorities and relate to environmental matters. For further information, see “Environmental” below and Item 1 of this Form 10-K. While it is not possible to predict or determine with certainty the outcome of any legal proceeding, we believe the outcome of any of these proceedings, or all of them combined, will not result in a material adverse effect on our consolidated results of operations, financial condition, or cash flows. In late 2013, Afton initiated a voluntary self-audit of its compliance with certain sections of the TSCA under the EPA’s Audit Policy. If any potential TSCA violations are discovered during the audit, we would voluntarily disclose them to the EPA under the Audit Policy. In August 2014, the EPA staff began its own TSCA inspection of both Afton and Ethyl. While it is not possible to predict or determine with certainty the outcome, we do not believe that any findings identified as a result of our audit or the EPA’s TSCA inspection will have a material adverse effect on our consolidated results of operations, financial condition, or cash flows. Asbestos We are a defendant in personal injury lawsuits involving exposure to asbestos. These cases involve exposure to asbestos in premises owned or operated, or formerly owned or operated, by subsidiaries of NewMarket. We have never manufactured, sold, or distributed products that contain asbestos. Nearly all of these cases are pending in Texas, Louisiana, or Illinois and involve multiple defendants. We maintain an accrual for these proceedings, as well as a receivable for expected insurance recoveries. The accrual for our premises asbestos liability related to currently asserted claims is based on the following assumptions and factors: • We are often one of many defendants. This factor influences both the number of claims settled against us and the indemnity cost associated with such resolutions. • The estimated percent of claimants in each case that, after discovery, will actually make a claim against us, out of the total number of claimants in a case, is based on a level consistent with past experience and current trends. • We utilize average comparable plaintiff cost history as the basis for estimating pending premises asbestos related claims. These claims are filed by both former contractors’ employees and former employees who worked at past and present company locations. We also include an estimated inflation factor in the calculation. • No estimate is made for unasserted claims. • The estimated recoveries from insurance and Albemarle Corporation (a former operation of our company) for these cases are based on, and are consistent with, the 2005 settlement agreements with Travelers Indemnity Company. Based on the above assumptions, we have provided an undiscounted liability related to premises asbestos claims of $11 million at both December 31, 2016 and December 31, 2015 . The liabilities related to asbestos claims are included in accrued expenses (current portion) and other noncurrent liabilities on the Consolidated Balance Sheets. Certain of these costs are recoverable through the settlement agreement with The Travelers Indemnity Company, as well as an agreement with Albemarle Corporation. The receivable for these recoveries related to premises asbestos liabilities was $5 million at December 31, 2016 and $6 million at December 31, 2015 . These receivables are included in trade and other accounts receivable, net on the Consolidated Balance Sheets for the current portion. The noncurrent portion is included in deferred charges and other assets. Environmental —We are involved in environmental proceedings and potential proceedings relating to soil and groundwater contamination, disposal of hazardous waste, and other environmental matters at several of our current or former facilities, or at third-party sites where we have been designated as a potentially responsible party (PRP). While we believe we are currently adequately accrued for known environmental issues, it is possible that unexpected future costs could have a significant impact on our financial position, results of operations, and cash flows. Our total accruals for environmental remediation, dismantling, and decontamination were approximately $16 million at December 31, 2016 and $17 million at December 31, 2015 . Of the total accrual, the current portion is included in accrued expenses and the noncurrent portion is included in other noncurrent liabilities on the Consolidated Balance Sheets. Our more significant environmental sites include a former TEL plant site in Louisiana (the Louisiana site) and a Houston, Texas plant site (the Texas site). Together, the amounts accrued on a discounted basis related to these sites represented approximately $10 million of the total accrual above at December 31, 2016 , using discount rates ranging from 4% to 9% , and $10 million of the total accrual above at December 31, 2015 , using discount rates ranging from 3% to 9% . The aggregate undiscounted amount for these sites was $13 million at December 31, 2016 and $14 million at December 31, 2015 . Of the total accrued for these two sites, the amount related to remediation of groundwater and soil was $4 million for the Louisiana site and $5 million for the Texas site at December 31, 2016 and $4 million for the Louisiana site and $6 million for the Texas site at December 31, 2015 . In 2000, the EPA named us as a PRP under Superfund law for the clean-up of soil and groundwater contamination at the five grouped disposal sites known as "Sauget Area 2 Sites" in Sauget, Illinois. Without admitting any fact, responsibility, fault, or liability in connection with this site, we are participating with other PRPs in site investigations and feasibility studies. In December 2013, the EPA issued its Record of Decision confirming its remedies for the selected Sauget Area 2 sites. We have accrued our estimated proportional share of the remedial costs and expenses addressed in the Record of Decision. We do not believe there is any additional information available as a basis for revision of the liability that we have established at December 31, 2016 . The amount accrued for this site is not material.

Pension Plans and Other Postret

Pension Plans and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Pension Plans and Other Postretirement Benefits	Pension Plans and Other Postretirement Benefits NewMarket uses a December 31 measurement date for all of our plans. U.S. Retirement Plans NewMarket sponsors four pension plans for all full-time U.S. employees that offer a benefit based primarily on years of service and compensation. Employees do not contribute to these pension plans. The plans are as follows: • Salaried employees pension plan; • Afton pension plan for union employees (the Sauget plan); • NewMarket retirement income plan for union employees in Houston, Texas (the Houston plan); and • Afton Chemical Additives pension plan for union employees in Port Arthur, Texas (the Port Arthur plan). In addition, we offer an unfunded, nonqualified supplemental pension plan. This plan restores the pension benefits from our regular pension plans that would have been payable to designated participants if it were not for limitations imposed by U.S. federal income tax regulations. We also provide postretirement health care benefits and life insurance to eligible retired employees. A plan amendment, with an effective date of January 1, 2016, was made in 2015 to provide post-65 medical and prescription drug benefits to retirees through a private healthcare exchange with fixed subsidies to eligible retirees through a health reimbursement account. As a result, the postretirement plan liabilities were remeasured at September 1, 2015 resulting in a non-cash improvement in the funded position. The adjustment to accumulated other comprehensive loss is reflected in prior service cost (credit) and is being amortized into expense. The components of net periodic pension and postretirement benefit cost (income), as well as other amounts recognized in other comprehensive income (loss), are shown below. Years Ended December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2014 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 12,860 $ 13,034 $ 9,608 $ 705 $ 2,244 $ 1,849 Interest cost 13,175 11,938 10,936 1,653 2,548 2,739 Expected return on plan assets (23,137 ) (20,467 ) (17,524 ) (1,239 ) (1,288 ) (1,311 ) Amortization of prior service cost (credit) 187 99 99 (3,028 ) (1,008 ) 9 Amortization of actuarial net (gain) loss 5,243 6,891 3,825 0 0 (713 ) Net periodic benefit cost (income) 8,328 11,495 6,944 (1,909 ) 2,496 2,573 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 9,140 11,095 56,364 156 (1,826 ) 16,264 Prior service cost (credit) 749 0 0 0 (35,768 ) 0 Amortization of actuarial net gain (loss) (5,243 ) (6,891 ) (3,825 ) 0 0 713 Amortization of prior service (cost) credit (187 ) (99 ) (99 ) 3,028 1,008 (9 ) Total recognized in other comprehensive income (loss) 4,459 4,105 52,440 3,184 (36,586 ) 16,968 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 12,787 $ 15,600 $ 59,384 $ 1,275 $ (34,090 ) $ 19,541 The estimated actuarial net loss to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) during 2017 is expected to be $5 million for pension plans. The estimated prior service cost to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) during 2017 is not expected to be material for pension plans. The estimated prior service credit to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) during 2017 related to postretirement benefits is expected to be $3 million . Changes in the plans’ benefit obligations and assets follow. December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 292,728 $ 291,119 $ 38,517 $ 74,203 Service cost 12,860 13,034 705 2,244 Interest cost 13,175 11,938 1,653 2,548 Actuarial net (gain) loss 6,087 (14,718 ) (322 ) (1,884 ) Plan amendment 748 0 0 (35,770 ) Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Benefit obligation at end of year 316,366 292,728 38,110 38,517 Change in plan assets Fair value of plan assets at beginning of year 260,911 255,571 23,972 24,270 Actual return on plan assets 20,083 (5,346 ) 761 1,228 Employer contributions 19,330 19,331 948 1,298 Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Fair value of plan assets at end of year 291,092 260,911 23,238 23,972 Funded status $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 15,188 $ 7,297 $ 0 $ 0 Current liabilities (2,781 ) (2,735 ) (1,313 ) (1,396 ) Noncurrent liabilities (37,681 ) (36,379 ) (13,559 ) (13,149 ) $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 107,061 $ 103,164 $ (925 ) $ (1,081 ) Prior service cost (credit) 58 (504 ) (31,732 ) (34,760 ) $ 107,119 $ 102,660 $ (32,657 ) $ (35,841 ) The accumulated benefit obligation for all domestic defined benefit pension plans was $272 million at December 31, 2016 and $251 million at December 31, 2015 . The fair market value of plan assets exceeded the accumulated benefit obligation for all domestic plans, except the nonqualified plan, at December 31, 2016 and December 31, 2015 . The fair market value of plan assets exceeded the projected benefit obligation for all domestic plans, except the nonqualified plan, at December 31, 2016 . The fair market value of plan assets exceeded the projected benefit obligation for all domestic plans, except the Salaried and the nonqualified plan, at December 31, 2015 . The net asset position for plans in which assets exceed the projected benefit obligation is included in prepaid pension cost on the Consolidated Balance Sheets. The net liability position of plans in which the projected benefit obligation exceeds assets is included in other noncurrent liabilities on the Consolidated Balance Sheets. A portion of the accrued benefit cost for the nonqualified plan is included in current liabilities at both December 31, 2016 and December 31, 2015 . As the nonqualified plan is unfunded, the amount reflected in current liabilities represents the expected benefit payments related to the nonqualified plan during 2017 . The first table below shows information on domestic pension plans with the accumulated benefit obligation in excess of plan assets. The second table presents information on domestic pension plans with the projected benefit obligation in excess of plan assets. December 31, (in thousands) 2016 2015 Plans with the accumulated benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 40,462 $ 37,637 Accumulated benefit obligation 35,939 34,526 Fair market value of plan assets 0 0 December 31, (in thousands) 2016 2015 Plans with the projected benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 40,462 $ 232,849 Fair market value of plan assets 0 193,736 There are no assets held by the trustee for the retired beneficiaries of the nonqualified plan. Payments to retired beneficiaries of the nonqualified plan are made with cash from operations. Assumptions —We used the following assumptions to calculate the results of our retirement plans: Pension Benefits Postretirement Benefits 2016 2015 2014 2016 2015 2014 Weighted-average assumptions used to determine net periodic benefit cost (income) for years ended December 31, Discount rate 4.500 % 4.125 % 5.000 % 4.500 % 4.125 % 5.000 % Expected long-term rate of return on plan assets 8.50 % 8.50 % 8.50 % 5.50 % 5.50 % 5.50 % Rate of projected compensation increase 3.50 % 3.50 % 3.50 % Weighted-average assumptions used to determine benefit obligations at December 31, Discount rate 4.250 % 4.500 % 4.125 % 4.250 % 4.500 % 4.125 % Rate of projected compensation increase 3.50 % 3.50 % 3.50 % For pension plans, we base the assumed expected long-term rate of return for plan assets on an analysis of our actual investments, including our asset allocation, as well as an analysis of expected returns. This analysis reflects the expected long-term rates of return for each significant asset class and economic indicator. As of January 1, 2017 , the expected rates were 8.5% for U.S. large cap stocks, 4.4% for fixed income, and 3% for inflation. The range of returns relies both on forecasts and on broad-market historical benchmarks for expected return, correlation, and volatility for each asset class. Our asset allocation is predominantly weighted toward equities. Through our ongoing monitoring of our investments and review of market data, we have determined that we should maintain the expected long-term rate of return for our U.S. plans at 8.5% at December 31, 2016 . For the postretirement plan, we based the assumed expected long-term rate of return for plan assets on an evaluation of projected interest rates, as well as the guaranteed interest rate for our insurance contract. Plan Assets —Pension plan assets are held and distributed by trusts and consist principally of equity securities and investment-grade fixed income securities. We invest directly in equity securities, as well as in funds which primarily hold equity and debt securities. Our target allocation is 90% to 97% in equities and 3% to 10% in debt securities or cash. The pension obligation is long-term in nature and the investment philosophy followed by the Pension Investment Committee is likewise long-term in its approach. The majority of the pension funds are invested in equity securities as historically, equity securities have outperformed debt securities and cash investments, resulting in a higher investment return over the long-term. While in the short-term, equity securities may underperform other investment classes, we are less concerned with short-term results and more concerned with long-term improvement. The pension funds are managed by six different investment companies who predominantly invest in U.S. and international equities. Each investment company’s performance is reviewed quarterly. A small portion of the funds is in investments such as cash or short-term bonds, which historically has been less vulnerable to short-term market swings. These funds are used to provide the cash needed to meet our monthly obligations. There are no significant concentrations of risk within plan assets, nor do the equity securities include any NewMarket common stock for any year presented. The assets of the postretirement benefit plan are invested completely in an insurance contract held by Metropolitan Life. No NewMarket common stock is included in these assets. The following table provides information on the fair value of our pension and postretirement benefit plans assets, as well as the related level within the fair value hierarchy. Investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified by level in the fair value hierarchy. December 31, 2016 December 31, 2015 Fair Value Measurements Using Fair Value Measurements Using (in thousands) Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension Plans Equity securities: U. S. companies $ 232,895 $ 232,895 $ 0 $ 0 $ 211,471 $ 211,471 $ 0 $ 0 International companies 1,757 1,757 0 0 9,512 9,512 0 0 Real estate investment trusts 2,653 2,653 0 0 3,339 3,339 0 0 Money market instruments 11,120 11,120 0 0 5,854 5,854 0 0 Pooled investment funds: Fixed income securities—mutual funds 8,799 8,799 0 0 8,560 8,560 0 0 International equities—mutual fund 13,104 13,104 0 0 0 0 0 0 Common collective trust measured at net asset value 19,780 19,329 Cash and cash equivalents 0 0 0 0 1,927 1,927 0 0 Insurance contract 984 0 984 0 919 0 919 0 $ 291,092 $ 270,328 $ 984 $ 0 $ 260,911 $ 240,663 $ 919 $ 0 Postretirement Plans Insurance contract $ 23,238 $ 0 $ 23,238 $ 0 $ 23,972 $ 0 $ 23,972 $ 0 The valuation methodologies used to develop the fair value measurements for the investments in the table above is outlined below. There have been no changes in the valuation techniques used to value the investments. • Equity securities, including common stock and real estate investment trusts, are valued at the closing price reported on a national exchange. • Money market instruments are valued at cost, which approximates fair value. • Mutual funds are valued at the closing price reported on a national exchange. • The common collective trust (the trust) is valued at the net asset value of units held based on the quoted market value of the underlying investments held by the fund. The trust invests primarily in a diversified portfolio of equity securities of companies located outside of the United States and Canada, as determined by a company's jurisdiction of incorporation. We may make withdrawals from the trust on the first business day of each month with at least ten business days' notice. There are no restrictions on redemption as of December 31, 2016 or December 31, 2015 . • Cash and cash equivalents are valued at cost. • The insurance contracts are unallocated funds deposited with an insurance company and are stated at an amount equal to the sum of all amounts deposited less the sum of all amounts withdrawn, adjusted for investment return. Cash Flows —For U.S. plans, NewMarket expects to contribute $19 million to our pension plans in 2017 . Contributions to our postretirement benefit plans are not expected to be material. The expected benefit payments for the next ten years are as follows. (in thousands) Expected Pension Benefit Payments Expected Postretirement Benefit Payments 2017 $ 10,785 $ 2,908 2018 11,614 2,737 2019 12,505 2,590 2020 13,271 2,449 2021 14,141 2,330 2022 through 2026 85,936 10,400 Foreign Retirement Plans For most employees of our foreign subsidiaries, NewMarket has defined benefit pension plans that offer benefits based primarily on years of service and compensation. These defined benefit plans provide benefits for employees of our foreign subsidiaries located in Belgium, the United Kingdom, Germany, Canada, and Mexico. NewMarket generally contributes to investment trusts and insurance accounts to provide for these plans. The components of net periodic pension cost (income), as well as other amounts recognized in other comprehensive income (loss), for these foreign defined benefit pension plans are shown below. Years Ended December 31, (in thousands) 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 6,926 $ 8,150 $ 6,213 Interest cost 4,915 4,932 5,993 Expected return on plan assets (6,638 ) (7,077 ) (8,012 ) Amortization of prior service cost (credit) (83 ) (95 ) (102 ) Amortization of actuarial net (gain) loss 1,021 1,587 1,092 Settlements and curtailments 0 0 1,817 Net periodic benefit cost (income) 6,141 7,497 7,001 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 3,215 (5,461 ) 13,004 Settlements and curtailments 0 0 (1,069 ) Amortization of actuarial net gain (loss) (1,021 ) (1,587 ) (1,092 ) Amortization of prior service (cost) credit 83 95 102 Total recognized in other comprehensive income (loss) 2,277 (6,953 ) 10,945 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 8,418 $ 544 $ 17,946 The settlements and curtailments amounts for 2014 in the table above reflect the termination of the Canadian Hourly pension plan and the settlement of the Canadian Salary pension plan. The estimated actuarial net loss to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) during 2017 is expected to be $1 million . The estimated prior service credit expected to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) during 2017 is expected to be $0.1 million . Changes in the benefit obligations and assets of the foreign defined benefit pension plans follow. December 31, (in thousands) 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 146,748 $ 158,279 Service cost 6,926 8,150 Interest cost 4,915 4,932 Employee contributions 832 917 Actuarial net (gain) loss 25,794 (10,736 ) Benefits paid (3,501 ) (5,203 ) Foreign currency translation (24,613 ) (9,591 ) Benefit obligation at end of year 157,101 146,748 Change in plan assets Fair value of plan assets at beginning of year 138,646 142,986 Actual return on plan assets 29,026 1,923 Employer contributions 5,441 5,981 Employee contributions 832 917 Benefits paid (3,501 ) (5,203 ) Foreign currency translation (25,567 ) (7,958 ) Fair value of plan assets at end of year 144,877 138,646 Funded status $ (12,224 ) $ (8,102 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 10,612 $ 13,133 Current liabilities (295 ) (302 ) Noncurrent liabilities (22,541 ) (20,933 ) $ (12,224 ) $ (8,102 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 42,809 $ 40,615 Prior service cost (credit) 39 (44 ) Transition obligation 10 10 $ 42,858 $ 40,581 The accumulated benefit obligation for all foreign defined benefit pension plans was $132 million at December 31, 2016 and $125 million at December 31, 2015 . The fair market value of plan assets exceeded both the accumulated benefit obligation and projected benefit obligation for the United Kingdom and the Canadian Salary plans at both year-end 2016 and 2015. The net asset position of the United Kingdom and Canadian Salary plans are included in prepaid pension cost on the Consolidated Balance Sheets at December 31, 2016 and December 31, 2015. The accumulated benefit obligation and projected benefit obligation exceeded the fair market value of plan assets for the German, Belgian, and Mexican plans at December 31, 2016 and December 31, 2015. The accrued benefit cost of these plans is included in other noncurrent liabilities on the Consolidated Balance Sheets. As the German plan is unfunded, a portion of the accrued benefit cost for the German plan is included in current liabilities at year-end 2016 and 2015, reflecting the expected benefit payments related to the plan for the following year. The first table below shows information on foreign pension plans with the accumulated benefit obligation in excess of plan assets. The second table shows information on foreign pension plans with the projected benefit obligation in excess of plan assets. December 31, (in thousands) 2016 2015 Plans with the accumulated benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 32,407 $ 30,521 Accumulated benefit obligation 21,310 20,005 Fair market value of plan assets 9,568 9,286 December 31, (in thousands) 2016 2015 Plans with the projected benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 32,407 $ 30,521 Fair market value of plan assets 9,568 9,286 Assumptions —The information in the table below provides the weighted-average assumptions used to calculate the results of our foreign defined benefit pension plans. 2016 2015 2014 Weighted-average assumptions used to determine net periodic benefit cost (income) for the years ended December 31, Discount rate 3.58 % 3.11 % 4.01 % Expected long-term rate of return on plan assets 5.10 % 5.03 % 5.66 % Rate of projected compensation increase 4.28 % 4.27 % 4.25 % Weighted-average assumptions used to determine benefit obligations at December 31, Discount rate 2.53 % 3.58 % 3.11 % Rate of projected compensation increase 4.20 % 4.28 % 4.27 % The actuarial assumptions used by the various foreign locations are based upon the circumstances of each particular country and pension plan. The factors impacting the determination of the long-term rate of return for a particular foreign pension plan include the market conditions within a particular country, as well as the investment strategy and asset allocation of the specific plan. Plan Assets —Pension plan assets vary by foreign location and plan. Assets are held and distributed by trusts and, depending upon the foreign location and plan, consist primarily of pooled equity funds, pooled corporate and government debt securities funds, a pooled investment property fund, cash, and insurance contracts. The combined weighted-average target allocation of our foreign pension plans is 51% in pooled equity funds, 38% in pooled debt securities funds, 6% in insurance contracts, and 5% in a pooled investment property fund. While the pension obligation is long-term in nature for each of our foreign plans, the investment strategies followed by each plan vary to some degree based upon the laws of a particular country, as well as the provisions of the specific pension trust. The United Kingdom and Canadian plans are invested predominantly in pooled equity securities funds and pooled debt securities funds. The funds of these plans are managed by various trustees and investment companies whose performance is reviewed throughout the year. The Belgian plan is invested in an insurance contract. The Mexican plan is invested in various mutual funds. The German plan has no assets. There are no significant concentrations of risk within plan assets, nor do the equity securities include any NewMarket common stock for any year presented. The following table provides information on the fair value of our foreign pension plans assets, as well as the related level within the fair value hierarchy. Investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified by level in the fair value hierarchy. December 31, 2016 December 31, 2015 Fair Value Measurements Using Fair Value Measurements Using (in thousands) Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Insurance contract $ 9,399 $ 0 $ 9,399 $ 0 $ 9,139 $ 0 $ 9,139 $ 0 Mutual funds 169 169 0 0 146 146 0 0 Cash and cash equivalents 427 427 0 0 321 321 0 0 Pooled investment funds (measured at net asset value): Equity securities—U.S. companies 9,341 9,522 Equity securities—international companies 64,903 61,588 Debt securities—corporate 284 22,890 Debt securities—government 55,273 28,696 Cash and cash equivalents 349 405 Property 4,732 5,939 $ 144,877 $ 596 $ 9,399 $ 0 $ 138,646 $ 467 $ 9,139 $ 0 The valuation methodologies used to develop the fair value measurements for the investments in the table above are outlined below. There have been no changes in the valuation techniques used to value the investments. • The insurance contract represents funds deposited with an insurance company and is stated at an amount equal to the sum of all amounts deposited less the sum of all amounts withdrawn, adjusted for investment return. • Mutual funds are valued at the closing price reported on a national exchange. • Cash and cash equivalents are valued at cost. • The pooled investment funds are valued at the net asset value of units held by the plans based on the quoted market value of the underlying investments held by the fund. The United Kingdom pension plan is invested in units of a property fund and units of life insurance policies that are linked to equity securities funds and government bond funds. The underlying assets of the equity funds and bond funds are traded on a national exchange and are based on tracking various indices of the London Stock Exchange. Both the equity and bond funds can trade 46 days per year with notice of two days prior to the transaction day. The property fund invests primarily in direct United Kingdom commercial property and has no redemption restrictions. There were no unfunded commitments for the United Kingdom pension plan funds. The Canadian pension plan is invested in a pooled Canadian equity fund and a pooled diversified fund. The Canadian equity fund invests in a diversification (sector and industry) of equities listed on a recognized Canadian exchange. The diversified fund invests in a balanced portfolio of marketable securities and controls short-term risk by diversification in equities, bonds and cash. There are no redemption restrictions on the pooled Canadian funds and there were no unfunded commitments. Cash Flows —For foreign pension plans, NewMarket expects to contribute $5 million to the plans in 2017 . The expected benefit payments for the next ten years for our foreign pension plans are shown in the table below. (in thousands) Expected Pension Benefit Payments 2017 $ 2,975 2018 3,865 2019 3,276 2020 4,555 2021 3,683 2022 through 2026 22,336

Other Income (Expense), Net

Other Income (Expense), Net	12 Months Ended
	Dec. 31, 2016
Other Nonoperating Income (Expense) [Abstract]
Other Income (Expense), Net	Other Income (Expense), Net Other income (expense), net was expense of $3 million in 2016 , $3 million in 2015 , and $7 million in 2014 , primarily representing losses on the Goldman Sachs interest rate swap derivative instrument recorded at fair value. See Note 14 for additional information on the interest rate swap. We terminated the interest swap on September 7, 2016.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Tax Expense	Income Taxes Our income before income tax expense, as well as our provision for income taxes is shown in the table below. Years Ended December 31, (in thousands) 2016 2015 2014 Income before income tax expense Domestic $ 161,687 $ 229,561 $ 226,777 Foreign 181,521 109,410 112,322 $ 343,208 $ 338,971 $ 339,099 Income tax expense Current income taxes Federal $ 34,213 $ 62,491 $ 61,866 State 9,020 11,216 13,763 Foreign 37,349 26,511 22,007 80,582 100,218 97,636 Deferred income taxes Federal 13,876 1,287 5,199 State 3,095 (936 ) 774 Foreign 2,214 (201 ) 2,235 19,185 150 8,208 Total income tax expense $ 99,767 $ 100,368 $ 105,844 The reconciliation of the U.S. federal statutory rate to the effective income tax rate follows: % of Income Before Income Tax Expense 2016 2015 2014 Federal statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal tax 2.3 2.0 2.8 Foreign operations (5.8 ) (4.3 ) (4.3 ) Domestic research tax credit (1.2 ) (1.2 ) (1.0 ) Domestic manufacturing tax benefit (0.8 ) (1.9 ) (2.0 ) Other items and adjustments (0.4 ) 0.0 0.7 Effective income tax rate 29.1 % 29.6 % 31.2 % Certain foreign operations have a U.S. tax impact due to our election to include their earnings in our federal income tax return. Our deferred income tax assets and liabilities follow. December 31, (in thousands) 2016 2015 Deferred income tax assets Future employee benefits $ 30,178 $ 31,932 Environmental and future shutdown reserves 5,737 6,051 Loss on derivatives 0 8,454 Trademark expenses 5,810 5,747 Foreign currency translation adjustments 6,687 7,489 Other 7,458 6,720 55,870 66,393 Deferred income tax liabilities Depreciation and amortization 29,736 25,119 Other 6,305 6,201 36,041 31,320 Net deferred income tax assets $ 19,829 $ 35,073 Reconciliation to financial statements Deferred income tax assets $ 29,063 $ 44,729 Deferred income tax liabilities 9,234 9,656 Net deferred income tax assets $ 19,829 $ 35,073 Deferred income tax liabilities are included in other noncurrent liabilities on our Consolidated Balance Sheets. Our deferred taxes are in a net asset position at December 31, 2016 . Based on current forecast operating plans and historical profitability, we believe that we will recover nearly the full benefit of our deferred tax assets. We have recorded an immaterial valuation allowance at certain foreign subsidiaries for the remainder. A reconciliation of the beginning and ending balances of the unrecognized tax benefits from uncertain positions is as follows: December 31, (in thousands) 2016 2015 2014 Balance at beginning of year $ 2,322 $ 1,465 $ 3,321 Increases for tax positions of prior years 773 1,035 730 Decreases for tax positions of prior years 0 0 (882 ) Increases for tax positions of the current year 5,826 533 425 Settlements (111 ) (497 ) (1,509 ) Lapses of statutes 0 (214 ) (620 ) Balance at end of year $ 8,810 $ 2,322 $ 1,465 The primary reason for the decrease in unrecognized tax benefits during 2014 was the conclusion of the Internal Revenue Service examination of the 2011 and 2012 tax years. Unrecognized tax benefits increased during 2016 primarily relating to foreign exchange losses recognized during the year. At December 31, 2016 , $8 million of the amount of unrecognized tax benefits, if recognized, would affect our effective tax rate. We expect the amount of unrecognized tax benefits to change in the next twelve months; however, we do not expect the change to have a material impact on our financial statements. Our U.S. subsidiaries file a U.S. federal consolidated income tax return. We are currently under examination by various U.S. state and foreign jurisdictions and remain subject to examination until the statute of limitations expires for the respective tax jurisdiction. We have concluded all U.S. federal tax matters through 2012. Foreign and U.S. state jurisdictions have statutes of limitations generally ranging from three to five years. Years still open to examination by foreign tax authorities in major jurisdictions include: the United Kingdom (2015 and forward); Singapore (2011 and forward); Belgium (2015 and forward); and Brazil (2012 and forward).

Other Comprehensive Income (Los

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss	Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss The balances of, and changes in, the components of accumulated other comprehensive loss, net of tax, consist of the following: (in thousands) Pension Plans Foreign Currency Translation Adjustments Accumulated Other Balance at December 31, 2013 $ (44,493 ) $ (15,593 ) $ (60,086 ) Other comprehensive income (loss) before reclassifications (54,473 ) (28,448 ) (82,921 ) Amounts reclassified from accumulated other comprehensive loss (a) 3,847 0 3,847 Other comprehensive income (loss) (50,626 ) (28,448 ) (79,074 ) Balance at December 31, 2014 (95,119 ) (44,041 ) (139,160 ) Other comprehensive income (loss) before reclassifications 20,524 (30,687 ) (10,163 ) Amounts reclassified from accumulated other comprehensive loss (a) 4,797 0 4,797 Other comprehensive income (loss) 25,321 (30,687 ) (5,366 ) Balance at December 31, 2015 (69,798 ) (74,728 ) (144,526 ) Other comprehensive income (loss) before reclassifications (8,565 ) (31,595 ) (40,160 ) Amounts reclassified from accumulated other comprehensive loss (a) 2,176 0 2,176 Other comprehensive income (loss) (6,389 ) (31,595 ) (37,984 ) Balance at December 31, 2016 $ (76,187 ) $ (106,323 ) $ (182,510 ) (a) The pension plan and other postretirement benefit components of accumulated other comprehensive loss are included in the computation of net periodic benefit cost (income). See Note 17 for further information.

Segment and Geographic Area Inf

Segment and Geographic Area Information	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment and Geographic Area Information	Segment and Geographic Area Information Segment Information —The tables below show our consolidated segment results. The “All other” category includes the operations of the TEL business, as well as certain contracted manufacturing and services associated with Ethyl. The segment accounting policies are the same as those described in Note 1. We evaluate the performance of the petroleum additives business based on segment operating profit. NewMarket Services departments and other expenses are billed to Afton and Ethyl based on the services provided under the holding company structure. Depreciation on segment property, plant, and equipment, as well as amortization of segment intangible assets, are included in segment operating profit. No transfers occurred between the petroleum additives segment and the “All other” category during the periods presented. The table below reports net sales and operating profit by segment, as well as a reconciliation to income before income tax expense, for the last three years. Years Ended December 31, (in thousands) 2016 2015 2014 Net sales Petroleum additives Lubricant additives $ 1,672,523 $ 1,740,956 $ 1,901,279 Fuel additives 362,122 384,039 423,803 Total 2,034,645 2,124,995 2,325,082 All other 14,806 15,835 10,323 Net sales (a) $ 2,049,451 $ 2,140,830 $ 2,335,405 Segment operating profit Petroleum additives $ 384,906 $ 374,934 $ 385,084 All other 530 4,372 1,279 Segment operating profit 385,436 379,306 386,363 Corporate, general, and administrative expenses (21,783 ) (22,779 ) (23,397 ) Interest and financing expenses, net (16,785 ) (14,652 ) (16,567 ) Other income (expense), net (3,660 ) (2,904 ) (7,300 ) Income before income tax expense $ 343,208 $ 338,971 $ 339,099 (a) Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014 . Sales to Shell amounted $261 million ( 11% of consolidated net sales) in 2014 . These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015. The following tables show asset information by segment and the reconciliation to consolidated assets. Segment assets consist of accounts receivable, inventory, and long-lived assets. Long-lived assets included in the petroleum additives segment amounts in the table below include property, plant, and equipment, net of depreciation, as well as intangibles (net of amortization) and goodwill. The additions to long-lived assets include only property, plant, and equipment for each year presented. December 31, (in thousands) 2016 2015 Segment assets Petroleum additives $ 1,083,585 $ 1,011,047 All other 16,019 14,324 1,099,604 1,025,371 Cash and cash equivalents 192,154 93,424 Other accounts receivable 7,547 4,184 Deferred income taxes 29,063 44,729 Prepaid expenses and other current assets 26,301 35,370 Non-segment property, plant, and equipment, net 29,870 29,640 Prepaid pension cost 25,800 20,430 Deferred charges and other assets 6,097 33,101 Total assets $ 1,416,436 $ 1,286,249 Years Ended December 31, (in thousands) 2016 2015 2014 Additions to long-lived assets Petroleum additives $ 145,768 $ 124,605 $ 57,065 All other 21 22 0 Corporate 1,895 1,872 2,651 Total additions to long-lived assets $ 147,684 $ 126,499 $ 59,716 Depreciation and amortization Petroleum additives $ 42,128 $ 39,365 $ 38,844 All other 15 12 27 Corporate 2,750 2,888 2,667 Total depreciation and amortization $ 44,893 $ 42,265 $ 41,538 Geographic Area Information - The tables below report net sales, total assets, and long-lived assets by geographic area, as well as by country for those countries with significant net sales or long-lived assets. Since our foreign operations are significant to our overall business, we are also presenting net sales in the table below by the major regions in which we operate. NewMarket assigns net sales to geographic areas based on the location to which the product was shipped to a third party. Long-lived assets in the table below include property, plant, and equipment, net of depreciation. Years Ended December 31, (in thousands) 2016 2015 2014 Net sales United States $ 701,209 $ 775,591 $ 810,766 Europe, Middle East, Africa, India 653,341 669,198 783,988 Asia Pacific 470,616 436,396 471,508 Other foreign 224,285 259,645 269,143 Net sales $ 2,049,451 $ 2,140,830 $ 2,335,405 December 31, (in thousands) 2016 2015 Total assets United States $ 539,792 $ 581,549 Foreign 876,644 704,700 Total assets $ 1,416,436 $ 1,286,249 Long-lived assets United States $ 224,790 $ 197,724 Singapore 189,485 113,219 Other foreign 89,470 91,503 Total long-lived assets $ 503,745 $ 402,446

Selected Quarterly Consolidated

Selected Quarterly Consolidated Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Selected Quarterly Consolidated Financial Data (unaudited)	Selected Quarterly Consolidated Financial Data (unaudited) (in thousands, except per-share amounts) First Quarter Second Quarter Third Quarter Fourth Quarter 2016 Net sales $ 509,927 $ 521,807 $ 516,090 $ 501,627 Gross profit 175,550 178,400 177,401 149,410 Net income 61,931 64,389 71,449 45,672 Earnings per share - basic and diluted 5.22 5.43 6.03 3.86 2015 First Quarter Second Quarter Third Quarter Fourth Quarter Net sales $ 559,566 $ 560,709 $ 540,933 $ 479,622 Gross profit 181,272 169,708 174,771 153,305 Net income 63,947 58,733 62,009 53,914 Earnings per share - basic and diluted 5.14 4.72 5.08 4.50

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently Adopted Accounting Pronouncements On January 1, 2016, we retrospectively adopted Accounting Standards Update (ASU) No. 2015-03, “Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs” (ASU 2015-03), which requires an entity to present debt issuance costs related to recognized debt liability in the balance sheet as a direct deduction from the carrying amount of the debt liability. The adoption of ASU 2015-03 resulted in a $3.6 million reduction of both “Deferred charges and other assets” and “Long-term debt” on the consolidated balance sheet at December 31, 2015 . Also on January 1, 2016, we adopted ASU No. 2015-15, “Interest - Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements” (ASU 2015-15), which allows a company to defer debt issuance costs associated with line-of-credit arrangements, including arrangements with no outstanding borrowings, classify them as an asset, and amortize them over the term of the arrangements. We adopted ASU 2015-15 concurrent with the adoption of ASU 2015-03, as required. Also on January 1, 2016, we early adopted ASU No. 2015-17, “Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes” (ASU 2015-17), which requires the reporting of deferred tax liabilities and deferred tax assets as noncurrent items on the classified balance sheet. We retrospectively adopted the provisions of ASU 2015-17 resulting in $6.4 million of current deferred income taxes being reclassified to non-current on the consolidated balance sheet at December 31, 2015 . Also on January 1, 2016, we adopted ASU No. 2015-07, "Disclosures for Investments in Certain Entities that Calculate Net Asset Value per Share (or Its Equivalent)" (ASU 2015-07), which eliminates the requirement to categorize investments in the fair value hierarchy if their fair value is measured using net asset value per share as a practical expedient. The adoption of ASU 2015-07 is reflected retrospectively in the fair value hierarchy table in Note 17 where the investments valued using net asset value per share as a practical expedient are excluded from categorization in the fair value hierarchy. On April 1, 2016, we early adopted ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting" (ASU 2016-09). The update involves several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. As required by the ASU, we adopted all of the amendments in the same period. The adoption of ASU 2016-09 did not have a material impact on our consolidated financial statements. Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (ASU 2014-09). ASU 2014-09 replaces the previous guidance and clarifies the principles for revenue recognition. It requires a five-step process for revenue recognition that represents the transfer of goods or services to customers in an amount that reflects the consideration expected to be received by a company. ASU 2014-09 also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenues and cash flows from contracts with customers. ASU 2014-09 is effective for our reporting period beginning January 1, 2018. Entities are permitted to adopt this standard one year early. Entities can transition to the standard either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We expect to adopt the standard on January 1, 2018 and continue to evaluate whether we will adopt the standard retrospectively or as a cumulative-effect adjustment. We expect to continue the evaluation, analysis, and documentation of our adoption of ASU 2014-09 (including those subsequently issued updates that clarify its provisions) throughout most of this year as we work towards the implementation and finalize the impact the adoption will have on our consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)" (ASU 2016-02). The FASB issued ASU 2016-02 to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring disclosures related to certain information about leasing arrangements. Under the new guidance, operating leases are, in most cases, required to be recognized on the balance sheet as a lease asset and liability. A modified retrospective approach is required for the adoption of ASU 2016-02, which is effective for our reporting period beginning January 1, 2019. Early adoption is permitted. We are currently assessing the impact that the adoption of ASU 2016-02 will have on our consolidated financial statements.

Summary of Significant Accoun33

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Consolidation	Consolidation —Our consolidated financial statements include the accounts of NewMarket Corporation and its subsidiaries. All intercompany transactions are eliminated upon consolidation. References to "we," "us," "our," the "company," and "NewMarket" are to NewMarket Corporation and its consolidated subsidiaries, unless the context indicates otherwise. NewMarket is the parent company of three operating companies, each managing its own assets and liabilities. Those companies are Afton, which focuses on petroleum additive products; Ethyl, representing certain contracted manufacturing and services, as well as the TEL business; and NewMarket Development, which manages the property and improvements that we own in Virginia. NewMarket is also the parent company of NewMarket Services, which provides various administrative services to NewMarket, Afton, Ethyl, and NewMarket Development. Certain reclassifications have been made to the accompanying consolidated financial statements and the related notes to conform to the current presentation.
Foreign Currency Translation	Foreign Currency Translation —We translate the balance sheets of our foreign subsidiaries into U.S. Dollars based on the current exchange rate at the end of each period. We translate the statements of income using the weighted-average exchange rates for the period. NewMarket includes translation adjustments in the Consolidated Balance Sheets as part of accumulated other comprehensive loss and transaction adjustments in the Consolidated Statements of Income as part of cost of goods sold.
Revenue Recognition	Revenue Recognition —Our policy is to recognize revenue from the sale of products when title and risk of loss have transferred to the buyer, the price is fixed and determinable, and collectability is reasonably assured. Net sales (revenues) are reported at the gross amount billed, including amounts related to shipping that are charged to the customer. Provisions for rebates to customers are recorded in the same period that the related sales are recorded. Freight costs incurred on the delivery of products are included in the Consolidated Statements of Income in cost of goods sold. Our standard terms of delivery are included in our contracts, sales order confirmation documents, and invoices. Taxes assessed by a governmental authority concurrent with sales to our customers, including sales, use, value-added, and revenue-related excise taxes, are not included as net sales, but are reflected in accrued expenses until remitted to the appropriate governmental authority.
Cash and Cash Equivalents	Cash and Cash Equivalents —Our cash equivalents consist of government obligations and commercial paper with original maturities of 90 days or less. Throughout the year, we have cash balances in excess of federally insured amounts on deposit with various financial institutions. We state cash and cash equivalents at cost, which approximates fair value.
Accounts Receivable	Accounts Receivable —We record our accounts receivable at net realizable value. We maintain an allowance for doubtful accounts for estimated losses resulting from our customers not making required payments. We determine the adequacy of the allowance by periodically evaluating each customer’s receivable balance, considering their financial condition and credit history, and considering current economic conditions.
Inventories	Inventories —NewMarket values its petroleum additives and TEL inventories at the lower of cost or net realizable value. In the United States, cost is determined on the last-in, first-out (LIFO) basis. In all other countries, we determine cost using the weighted-average method. Inventory cost includes raw materials, direct labor, and manufacturing overhead.
Property, Plant, and Equipment	Property, Plant, and Equipment —We state property, plant, and equipment at cost and compute depreciation by the straight-line method based on the estimated useful lives of the assets. We capitalize expenditures for significant improvements that extend the useful life of the related property. We expense repairs and maintenance, including plant turnaround costs, as incurred. When property is sold or retired, we remove the cost and accumulated depreciation from the accounts and any related gain or loss is included in earnings.
Intangibles (Net of Amortization) and Goodwill	Intangibles (Net of Amortization) and Goodwill —Identifiable intangibles include the cost of acquired contracts, formulas and technology, trademarks and trade names, and customer bases. We assign a value to identifiable intangibles based on independent third-party appraisals and management's assessment at the time of acquisition. NewMarket amortizes the cost of the customer bases by an accelerated method and the cost of the remaining identifiable intangibles by the straight-line method over the estimated economic life of the intangible. Goodwill arises from the excess of cost over net assets of businesses acquired. Goodwill represents the residual purchase price after allocation to all identifiable net assets. We test goodwill for impairment each year, as well as whenever a significant event or circumstance occurs which could reduce the fair value of the reporting unit to which the goodwill applies below the carrying amount of the reporting unit.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets —When significant events or circumstances occur that might impair the value of long-lived assets, we evaluate recoverability of the recorded cost of these assets. Assets are considered to be impaired if their carrying amount is not recoverable from the estimated undiscounted future cash flows associated with the assets. If we determine an asset is impaired and its recorded cost is higher than estimated fair market value based on the estimated present value of future cash flows, we adjust the asset to estimated fair market value.
Environmental Costs	Environmental Costs —NewMarket capitalizes environmental compliance costs if they extend the useful life of the related property or prevent future contamination. Environmental compliance costs also include maintenance and operation of pollution prevention and control facilities. We expense these compliance costs in cost of goods sold as incurred. Accrued environmental remediation and monitoring costs relate to an existing condition caused by past operations. NewMarket accrues these costs in current operations within cost of goods sold in the Consolidated Statements of Income when it is probable that we have incurred a liability and the amount can be reasonably estimated. These estimates are based on an assessment of the site, available clean-up methods, and prior experience in handling remediation. When we can reliably determine the amount and timing of future cash flows, we discount these liabilities, incorporating an inflation factor.
Legal Costs	Legal Costs —We expense legal costs in the period incurred.
Employee Savings Plan	Employee Savings Plan —Most of our full-time salaried and hourly employees may participate in defined contribution savings plans. Employees who are covered by collective bargaining agreements may also participate in a savings plan according to the terms of their bargaining agreements. Employees, as well as NewMarket, contribute to the plans.
Research, Development, and Testing Expenses	Research, Development, and Testing Expenses —NewMarket expenses all research, development, and testing costs as incurred. R&D costs include personnel-related costs, as well as internal and external testing of our products.
Income Taxes	Income Taxes —We recognize deferred income taxes for temporary differences between the financial reporting basis and the income tax basis of assets and liabilities. We also adjust for changes in tax rates and laws at the time the changes are enacted. A valuation allowance is recorded when it is more likely than not that a deferred tax asset will not be realized. We recognize accrued interest and penalties associated with uncertain tax positions as part of income tax expense on our Consolidated Statements of Income. We generally provide for additional U.S. taxes that would be incurred if a foreign subsidiary returns its earnings in cash to the United States.
Capital Lease Obligation	Capital Lease Obligation —We record our capital lease obligations at the lower of fair market value of the related asset at the inception of the lease or the present value of the total minimum lease payments.
Derivative Financial Instruments and Hedging Activities	Derivative Financial Instruments and Hedging Activities —We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. We do not enter into derivative instruments for speculative purposes. We had no derivative financial instruments outstanding at December 31, 2016.
Stock-based Compensation	Stock-based Compensation —We calculate the fair value of restricted stock and restricted stock units based on the closing price of our common stock on the date of grant. If award recipients are entitled to receive dividends during the vesting period, we make no adjustment to the fair value of the award for dividends. If the award does not entitle recipients to dividends during the vesting period, we reduce the grant-date price of our common stock by the present value of the dividends expected to be paid on the underlying shares during the vesting period, discounted at the risk-free interest rate. We recognize stock-based compensation expense for the number of awards expected to vest on a straight-line basis over the requisite service period.
Estimates and Risks Due to Concentration of Business	Estimates and Risks Due to Concentration of Business —The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Derivatives Offsetting Fair Value Amounts Policy	We have made an accounting policy election to not offset derivative fair value amounts with the fair value amounts for the right to reclaim cash collateral under our master netting arrangement.
Fair Value Measurements	Before the termination of the interest swap, its fair value was determined using the market standard methodology of netting the discounted future fixed cash receipts and the discounted expected variable cash payments. The analysis reflected the contractual term of the derivative, including the period to maturity. The variable cash payments were based on an expectation of future interest rates derived from observable market interest rate curves. In determining the fair value measurements, we incorporated credit valuation adjustments to appropriately reflect both our nonperformance risk and the counterparties’ nonperformance risk. Although we determined that the majority of the inputs used to value our derivative fell within Level 2 of the fair value hierarchy, the credit valuation adjustment associated with the derivative utilized Level 3 inputs. These Level 3 inputs included estimates of current credit spreads to evaluate the likelihood of default by both us and the counterparties to the derivative. As of December 31, 2015 , we assessed the significance of the impact of the credit valuation adjustment on the overall valuation of our derivative and determined that the credit valuation adjustment was not significant to the overall valuation of the derivative. Accordingly, we determined that our derivative valuation should be classified in Level 2 of the fair value hierarchy. We have made an accounting policy election to measure credit risk of any derivative financial instruments subject to master netting agreements on a net basis by counterparty portfolio.
Long-term Debt	Long-term debt - We record the carrying amount of our long-term debt at historical cost, less deferred financing costs related to the 4.10% senior notes.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share	The following table illustrates the earnings allocation method utilized in the calculation of basic and diluted earnings per share. Years Ended December 31, (in thousands, except per-share amounts) 2016 2015 2014 Earnings per share numerator: Net income attributable to common shareholders before allocation of earnings to participating securities $ 243,441 $ 238,603 $ 233,255 Earnings allocated to participating securities 477 482 391 Net income attributable to common shareholders after allocation of earnings to participating securities $ 242,964 $ 238,121 $ 232,864 Earnings per share denominator: Weighted-average number of shares of common stock outstanding - basic and diluted 11,828 12,241 12,671 Earnings per share - basic and diluted $ 20.54 $ 19.45 $ 18.38

Supplemental Cash Flow Inform35

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Schedule Of Supplemental Cash Flow Information	Years Ended December 31, (in thousands) 2016 2015 2014 Cash paid during the year for Interest and financing expenses (net of capitalization) $ 18,775 $ 16,193 $ 16,223 Income taxes 60,998 99,006 112,289 Supplemental disclosure of non-cash transactions Release of deposit account funds to terminate interest rate swap 21,868 0 0 Non-cash additions to property, plant, and equipment 8,762 13,959 5,933 Non-cash obligation under capital lease 4,810 0 0

Trade and Other Accounts Rece36

Trade and Other Accounts Receivable, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Schedule of Trade and Other Accounts Receivable, Net	December 31, (in thousands) 2016 2015 Trade receivables $ 265,991 $ 252,699 Income tax receivables 26,189 20,141 Other 14,736 15,127 $ 306,916 $ 287,967

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Schedule Of Inventories	December 31, (in thousands) 2016 2015 Finished goods and work-in-process $ 254,068 $ 292,978 Raw materials 45,581 48,728 Stores, supplies, and other 11,863 9,925 $ 311,512 $ 351,631

Prepaid Expenses and Other Cu38

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Prepaid Expense and Other Assets, Current [Abstract]
Schedule of Prepaid Expenses and Other Current Assets	December 31, (in thousands) 2016 2015 Dividend funding $ 17,478 $ 17,594 Income taxes on intercompany profit 3,954 12,310 Other 4,869 5,466 $ 26,301 $ 35,370

Property, Plant, and Equipmen39

Property, Plant, and Equipment, at Cost (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule Of Property, Plant, And Equipment, At Cost	December 31, (in thousands) 2016 2015 Land $ 40,190 $ 41,101 Land improvements 44,048 32,074 Leasehold improvements 1,510 1,516 Buildings 161,512 156,555 Machinery and equipment 915,423 774,857 Construction in progress 102,274 122,886 $ 1,264,957 $ 1,128,989
Schedule Of Useful Lives Of Property, Plant, And Equipment	We depreciate the cost of property, plant, and equipment by the straight-line method over the following estimated useful lives: Land improvements 5 - 30 years Buildings 10 - 48 years Machinery and equipment 3 - 20 years

Intangibles (Net of Amortizat40

Intangibles (Net of Amortization) and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Of Intangible Assets and Goodwill	The gross carrying amount and accumulated amortization of each type of intangible asset and goodwill are presented in the table below. December 31, 2016 2015 (in thousands) Gross Carrying Amount Accumulated Amortization Gross Carrying Amount Accumulated Amortization Amortizing intangible assets Formulas and technology $ 2,678 $ 1,958 $ 88,763 $ 86,861 Contracts 2,000 0 4,476 4,103 Customer bases 6,938 3,961 6,977 3,627 Trademarks and trade names 1,513 1,069 1,549 923 Goodwill 4,295 4,656 $ 17,424 $ 6,988 $ 106,421 $ 95,514 Aggregate amortization expense $ 1,860 $ 5,704
Schedule Of Estimated Annual Amortization Expense Related To Intangible Assets	Estimated annual amortization expense related to our intangible assets for the next five years is expected to be (in thousands): 2017 $ 864 2018 834 2019 813 2020 504 2021 440

Deferred Charges and Other As41

Deferred Charges and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Other Assets, Noncurrent [Abstract]
Schedule Of Deferred Charges and Other Assets	December 31, (in thousands) 2016 2015 Asbestos insurance receivables $ 4,147 $ 5,244 Deferred financing costs, net of amortization 1,414 1,914 Interest rate swap deposits 0 26,130 Other 4,948 6,057 $ 10,509 $ 39,345

Accrued Expenses (Tables)

Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2016
Accrued Liabilities, Current [Abstract]
Schedule Of Accrued Expenses	December 31, (in thousands) 2016 2015 Employee benefits, payroll, and related taxes $ 33,019 $ 30,562 Customer rebates 20,944 21,290 Capital projects 18,779 13,927 Taxes other than income and payroll 6,046 7,216 Other 25,294 26,516 $ 104,082 $ 99,511

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Long-term Debt and Capital Lease Obligations [Abstract]
Schedule Of Long-Term Debt	December 31, (in thousands) 2016 2015 Senior notes - 4.10% due 2022 (net of related deferred financing costs) $ 346,505 $ 345,920 Revolving credit facility 156,000 145,000 Capital lease obligation 4,770 0 $ 507,275 $ 490,920
Schedule of Unused Portion of Revolving Credit Facility	The following table provides information related to the unused portion of our revolving credit facility in effect at December 31, 2016 and December 31, 2015 : December 31, (in thousands) 2016 2015 Maximum borrowing capacity under the revolving credit facility $ 650,000 $ 650,000 Outstanding borrowings under the revolving credit facility 156,000 145,000 Outstanding letters of credit 3,483 2,895 Unused portion of revolving credit facility $ 490,517 $ 502,105

Other Noncurrent Liabilities (T

Other Noncurrent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Schedule Of Other Noncurrent Liabilities	December 31, (in thousands) 2016 2015 Employee benefits $ 81,377 $ 77,413 Environmental remediation 13,796 14,907 Asbestos litigation reserve 9,710 9,571 Deferred income taxes 9,234 9,656 Interest rate swaps 0 19,494 Other 17,203 13,044 $ 131,320 $ 144,085

Stock-based Compensation (Table

Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2016
Share-based Compensation [Abstract]
Schedule of Restricted Stock and Restricted Stock Unit Activity	A summary of activity during 2016 related to NewMarket’s restricted stock and restricted stock units (stock awards) is presented below in whole shares: Number of Shares Weighted Average Grant-Date Fair Value Unvested stock awards at January 1, 2016 27,434 $ 359.48 Vested in 2016 7,575 314.19 Forfeited in 2016 1,745 351.29 Unvested stock awards at December 31, 2016 18,114 379.22

Derivatives and Hedging Activ46

Derivatives and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	The table below presents the fair value of our derivative financial instruments, as well as their classification on the Consolidated Balance Sheets. Liability Derivatives December 31, 2016 December 31, 2015 (in thousands) Balance Sheet Location Fair Value Balance Sheet Location Fair Value Derivatives Not Designated as Hedging Instruments Goldman Sachs interest rate swap Accrued expenses and Other noncurrent liabilities $ 0 Accrued expenses and Other noncurrent liabilities $ 21,734
Effect of Derivative Instruments on the Consolidated Statements of Income Non-Designated Derivatives	The following table presents the effect of our derivative financial instruments on the Consolidated Statements of Income. Effect of Derivative Instruments on the Consolidated Statements of Income Not Designated Derivatives (in thousands) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Amount of Gain (Loss) Recognized in Income on Derivatives Years Ended December 31, 2016 2015 2014 Goldman Sachs interest rate swap Other income (expense), net $ (4,883 ) $ (3,221 ) $ (7,125 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Assets And Liabilities Measured At Fair Value On A Recurring Basis	The following table provides information on assets and liabilities measured at fair value on a recurring basis. No material events occurred during 2016 requiring adjustment to the recognized balances of assets or liabilities which are recorded at fair value on a nonrecurring basis. As discussed in Note 14 , we terminated the interest swap on September 7, 2016 . Carrying Amount in Consolidated Balance Sheets Fair Value Fair Value Measurements Using Level 1 Level 2 Level 3 (in thousands) December 31, 2016 Cash and cash equivalents $ 192,154 $ 192,154 $ 192,154 $ 0 $ 0 December 31, 2015 Cash and cash equivalents $ 93,424 $ 93,424 $ 93,424 $ 0 $ 0 Cash deposit for collateralized interest rate swap 26,130 26,130 26,130 0 0 Interest rate swap liability 21,734 21,734 0 21,734 0
Estimated Fair Value Of Long-Term Debt	December 31, 2016 December 31, 2015 (in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt (excluding capital lease obligation) $ 502,505 $ 507,925 $ 490,920 $ 515,302

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Future Lease Payments For Noncancelable Operating Leases	Future lease payments for all noncancelable operating leases as of December 31, 2016 are (in thousands): 2017 $ 14,235 2018 11,698 2019 9,520 2020 6,796 2021 4,776 After 2021 23,515
Future Payments for Purchase Obligations	Future payments for purchase obligations as of December 31, 2016 are (in thousands): 2017 $ 150,740 2018 163,953 2019 167,368 2020 151,066 2021 148,113 After 2021 239,740

Pension Plans and Other Postr49

Pension Plans and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2016
U.S. Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Periodic Benefit Cost (Income)	The components of net periodic pension and postretirement benefit cost (income), as well as other amounts recognized in other comprehensive income (loss), are shown below. Years Ended December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2014 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 12,860 $ 13,034 $ 9,608 $ 705 $ 2,244 $ 1,849 Interest cost 13,175 11,938 10,936 1,653 2,548 2,739 Expected return on plan assets (23,137 ) (20,467 ) (17,524 ) (1,239 ) (1,288 ) (1,311 ) Amortization of prior service cost (credit) 187 99 99 (3,028 ) (1,008 ) 9 Amortization of actuarial net (gain) loss 5,243 6,891 3,825 0 0 (713 ) Net periodic benefit cost (income) 8,328 11,495 6,944 (1,909 ) 2,496 2,573 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 9,140 11,095 56,364 156 (1,826 ) 16,264 Prior service cost (credit) 749 0 0 0 (35,768 ) 0 Amortization of actuarial net gain (loss) (5,243 ) (6,891 ) (3,825 ) 0 0 713 Amortization of prior service (cost) credit (187 ) (99 ) (99 ) 3,028 1,008 (9 ) Total recognized in other comprehensive income (loss) 4,459 4,105 52,440 3,184 (36,586 ) 16,968 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 12,787 $ 15,600 $ 59,384 $ 1,275 $ (34,090 ) $ 19,541
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The components of net periodic pension and postretirement benefit cost (income), as well as other amounts recognized in other comprehensive income (loss), are shown below. Years Ended December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2014 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 12,860 $ 13,034 $ 9,608 $ 705 $ 2,244 $ 1,849 Interest cost 13,175 11,938 10,936 1,653 2,548 2,739 Expected return on plan assets (23,137 ) (20,467 ) (17,524 ) (1,239 ) (1,288 ) (1,311 ) Amortization of prior service cost (credit) 187 99 99 (3,028 ) (1,008 ) 9 Amortization of actuarial net (gain) loss 5,243 6,891 3,825 0 0 (713 ) Net periodic benefit cost (income) 8,328 11,495 6,944 (1,909 ) 2,496 2,573 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 9,140 11,095 56,364 156 (1,826 ) 16,264 Prior service cost (credit) 749 0 0 0 (35,768 ) 0 Amortization of actuarial net gain (loss) (5,243 ) (6,891 ) (3,825 ) 0 0 713 Amortization of prior service (cost) credit (187 ) (99 ) (99 ) 3,028 1,008 (9 ) Total recognized in other comprehensive income (loss) 4,459 4,105 52,440 3,184 (36,586 ) 16,968 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 12,787 $ 15,600 $ 59,384 $ 1,275 $ (34,090 ) $ 19,541
Schedule of Changes in the Plans' Benefit Obligations and Assets	Changes in the plans’ benefit obligations and assets follow. December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 292,728 $ 291,119 $ 38,517 $ 74,203 Service cost 12,860 13,034 705 2,244 Interest cost 13,175 11,938 1,653 2,548 Actuarial net (gain) loss 6,087 (14,718 ) (322 ) (1,884 ) Plan amendment 748 0 0 (35,770 ) Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Benefit obligation at end of year 316,366 292,728 38,110 38,517 Change in plan assets Fair value of plan assets at beginning of year 260,911 255,571 23,972 24,270 Actual return on plan assets 20,083 (5,346 ) 761 1,228 Employer contributions 19,330 19,331 948 1,298 Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Fair value of plan assets at end of year 291,092 260,911 23,238 23,972 Funded status $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 15,188 $ 7,297 $ 0 $ 0 Current liabilities (2,781 ) (2,735 ) (1,313 ) (1,396 ) Noncurrent liabilities (37,681 ) (36,379 ) (13,559 ) (13,149 ) $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 107,061 $ 103,164 $ (925 ) $ (1,081 ) Prior service cost (credit) 58 (504 ) (31,732 ) (34,760 ) $ 107,119 $ 102,660 $ (32,657 ) $ (35,841 )
Schedule of Amounts Recognized in the Consolidated Balance Sheets	Changes in the plans’ benefit obligations and assets follow. December 31, Pension Benefits Postretirement Benefits (in thousands) 2016 2015 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 292,728 $ 291,119 $ 38,517 $ 74,203 Service cost 12,860 13,034 705 2,244 Interest cost 13,175 11,938 1,653 2,548 Actuarial net (gain) loss 6,087 (14,718 ) (322 ) (1,884 ) Plan amendment 748 0 0 (35,770 ) Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Benefit obligation at end of year 316,366 292,728 38,110 38,517 Change in plan assets Fair value of plan assets at beginning of year 260,911 255,571 23,972 24,270 Actual return on plan assets 20,083 (5,346 ) 761 1,228 Employer contributions 19,330 19,331 948 1,298 Benefits paid (9,232 ) (8,645 ) (2,443 ) (2,824 ) Fair value of plan assets at end of year 291,092 260,911 23,238 23,972 Funded status $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 15,188 $ 7,297 $ 0 $ 0 Current liabilities (2,781 ) (2,735 ) (1,313 ) (1,396 ) Noncurrent liabilities (37,681 ) (36,379 ) (13,559 ) (13,149 ) $ (25,274 ) $ (31,817 ) $ (14,872 ) $ (14,545 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 107,061 $ 103,164 $ (925 ) $ (1,081 ) Prior service cost (credit) 58 (504 ) (31,732 ) (34,760 ) $ 107,119 $ 102,660 $ (32,657 ) $ (35,841 )
Schedule of Assumptions to Calculate the Results of Our Retirement Plans	We used the following assumptions to calculate the results of our retirement plans: Pension Benefits Postretirement Benefits 2016 2015 2014 2016 2015 2014 Weighted-average assumptions used to determine net periodic benefit cost (income) for years ended December 31, Discount rate 4.500 % 4.125 % 5.000 % 4.500 % 4.125 % 5.000 % Expected long-term rate of return on plan assets 8.50 % 8.50 % 8.50 % 5.50 % 5.50 % 5.50 % Rate of projected compensation increase 3.50 % 3.50 % 3.50 % Weighted-average assumptions used to determine benefit obligations at December 31, Discount rate 4.250 % 4.500 % 4.125 % 4.250 % 4.500 % 4.125 % Rate of projected compensation increase 3.50 % 3.50 % 3.50 %
Schedule of Fair Value of Pension and Postretirement Benefit Plans Assets	The following table provides information on the fair value of our pension and postretirement benefit plans assets, as well as the related level within the fair value hierarchy. Investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified by level in the fair value hierarchy. December 31, 2016 December 31, 2015 Fair Value Measurements Using Fair Value Measurements Using (in thousands) Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Pension Plans Equity securities: U. S. companies $ 232,895 $ 232,895 $ 0 $ 0 $ 211,471 $ 211,471 $ 0 $ 0 International companies 1,757 1,757 0 0 9,512 9,512 0 0 Real estate investment trusts 2,653 2,653 0 0 3,339 3,339 0 0 Money market instruments 11,120 11,120 0 0 5,854 5,854 0 0 Pooled investment funds: Fixed income securities—mutual funds 8,799 8,799 0 0 8,560 8,560 0 0 International equities—mutual fund 13,104 13,104 0 0 0 0 0 0 Common collective trust measured at net asset value 19,780 19,329 Cash and cash equivalents 0 0 0 0 1,927 1,927 0 0 Insurance contract 984 0 984 0 919 0 919 0 $ 291,092 $ 270,328 $ 984 $ 0 $ 260,911 $ 240,663 $ 919 $ 0 Postretirement Plans Insurance contract $ 23,238 $ 0 $ 23,238 $ 0 $ 23,972 $ 0 $ 23,972 $ 0
Schedule of Expected Benefit Payments	The expected benefit payments for the next ten years are as follows. (in thousands) Expected Pension Benefit Payments Expected Postretirement Benefit Payments 2017 $ 10,785 $ 2,908 2018 11,614 2,737 2019 12,505 2,590 2020 13,271 2,449 2021 14,141 2,330 2022 through 2026 85,936 10,400
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Plans With the Benefit Obligation in Excess of the Fair Market Value of Plan Assets	The first table below shows information on domestic pension plans with the accumulated benefit obligation in excess of plan assets. The second table presents information on domestic pension plans with the projected benefit obligation in excess of plan assets. December 31, (in thousands) 2016 2015 Plans with the accumulated benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 40,462 $ 37,637 Accumulated benefit obligation 35,939 34,526 Fair market value of plan assets 0 0 December 31, (in thousands) 2016 2015 Plans with the projected benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 40,462 $ 232,849 Fair market value of plan assets 0 193,736
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Periodic Benefit Cost (Income)	The components of net periodic pension cost (income), as well as other amounts recognized in other comprehensive income (loss), for these foreign defined benefit pension plans are shown below. Years Ended December 31, (in thousands) 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 6,926 $ 8,150 $ 6,213 Interest cost 4,915 4,932 5,993 Expected return on plan assets (6,638 ) (7,077 ) (8,012 ) Amortization of prior service cost (credit) (83 ) (95 ) (102 ) Amortization of actuarial net (gain) loss 1,021 1,587 1,092 Settlements and curtailments 0 0 1,817 Net periodic benefit cost (income) 6,141 7,497 7,001 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 3,215 (5,461 ) 13,004 Settlements and curtailments 0 0 (1,069 ) Amortization of actuarial net gain (loss) (1,021 ) (1,587 ) (1,092 ) Amortization of prior service (cost) credit 83 95 102 Total recognized in other comprehensive income (loss) 2,277 (6,953 ) 10,945 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 8,418 $ 544 $ 17,946
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The components of net periodic pension cost (income), as well as other amounts recognized in other comprehensive income (loss), for these foreign defined benefit pension plans are shown below. Years Ended December 31, (in thousands) 2016 2015 2014 Net periodic benefit cost (income) Service cost $ 6,926 $ 8,150 $ 6,213 Interest cost 4,915 4,932 5,993 Expected return on plan assets (6,638 ) (7,077 ) (8,012 ) Amortization of prior service cost (credit) (83 ) (95 ) (102 ) Amortization of actuarial net (gain) loss 1,021 1,587 1,092 Settlements and curtailments 0 0 1,817 Net periodic benefit cost (income) 6,141 7,497 7,001 Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) Actuarial net (gain) loss 3,215 (5,461 ) 13,004 Settlements and curtailments 0 0 (1,069 ) Amortization of actuarial net gain (loss) (1,021 ) (1,587 ) (1,092 ) Amortization of prior service (cost) credit 83 95 102 Total recognized in other comprehensive income (loss) 2,277 (6,953 ) 10,945 Total recognized in net periodic benefit cost (income) and other comprehensive income (loss) $ 8,418 $ 544 $ 17,946
Schedule of Changes in the Plans' Benefit Obligations and Assets	Changes in the benefit obligations and assets of the foreign defined benefit pension plans follow. December 31, (in thousands) 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 146,748 $ 158,279 Service cost 6,926 8,150 Interest cost 4,915 4,932 Employee contributions 832 917 Actuarial net (gain) loss 25,794 (10,736 ) Benefits paid (3,501 ) (5,203 ) Foreign currency translation (24,613 ) (9,591 ) Benefit obligation at end of year 157,101 146,748 Change in plan assets Fair value of plan assets at beginning of year 138,646 142,986 Actual return on plan assets 29,026 1,923 Employer contributions 5,441 5,981 Employee contributions 832 917 Benefits paid (3,501 ) (5,203 ) Foreign currency translation (25,567 ) (7,958 ) Fair value of plan assets at end of year 144,877 138,646 Funded status $ (12,224 ) $ (8,102 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 10,612 $ 13,133 Current liabilities (295 ) (302 ) Noncurrent liabilities (22,541 ) (20,933 ) $ (12,224 ) $ (8,102 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 42,809 $ 40,615 Prior service cost (credit) 39 (44 ) Transition obligation 10 10 $ 42,858 $ 40,581
Schedule of Amounts Recognized in the Consolidated Balance Sheets	Changes in the benefit obligations and assets of the foreign defined benefit pension plans follow. December 31, (in thousands) 2016 2015 Change in benefit obligation Benefit obligation at beginning of year $ 146,748 $ 158,279 Service cost 6,926 8,150 Interest cost 4,915 4,932 Employee contributions 832 917 Actuarial net (gain) loss 25,794 (10,736 ) Benefits paid (3,501 ) (5,203 ) Foreign currency translation (24,613 ) (9,591 ) Benefit obligation at end of year 157,101 146,748 Change in plan assets Fair value of plan assets at beginning of year 138,646 142,986 Actual return on plan assets 29,026 1,923 Employer contributions 5,441 5,981 Employee contributions 832 917 Benefits paid (3,501 ) (5,203 ) Foreign currency translation (25,567 ) (7,958 ) Fair value of plan assets at end of year 144,877 138,646 Funded status $ (12,224 ) $ (8,102 ) Amounts recognized in the Consolidated Balance Sheets Noncurrent assets $ 10,612 $ 13,133 Current liabilities (295 ) (302 ) Noncurrent liabilities (22,541 ) (20,933 ) $ (12,224 ) $ (8,102 ) Amounts recognized in accumulated other comprehensive loss Actuarial net (gain) loss $ 42,809 $ 40,615 Prior service cost (credit) 39 (44 ) Transition obligation 10 10 $ 42,858 $ 40,581
Schedule of Plans With the Benefit Obligation in Excess of the Fair Market Value of Plan Assets	The first table below shows information on foreign pension plans with the accumulated benefit obligation in excess of plan assets. The second table shows information on foreign pension plans with the projected benefit obligation in excess of plan assets. December 31, (in thousands) 2016 2015 Plans with the accumulated benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 32,407 $ 30,521 Accumulated benefit obligation 21,310 20,005 Fair market value of plan assets 9,568 9,286 December 31, (in thousands) 2016 2015 Plans with the projected benefit obligation in excess of the fair market value of plan assets Projected benefit obligation $ 32,407 $ 30,521 Fair market value of plan assets 9,568 9,286
Schedule of Assumptions to Calculate the Results of Our Retirement Plans	The information in the table below provides the weighted-average assumptions used to calculate the results of our foreign defined benefit pension plans. 2016 2015 2014 Weighted-average assumptions used to determine net periodic benefit cost (income) for the years ended December 31, Discount rate 3.58 % 3.11 % 4.01 % Expected long-term rate of return on plan assets 5.10 % 5.03 % 5.66 % Rate of projected compensation increase 4.28 % 4.27 % 4.25 % Weighted-average assumptions used to determine benefit obligations at December 31, Discount rate 2.53 % 3.58 % 3.11 % Rate of projected compensation increase 4.20 % 4.28 % 4.27 %
Schedule of Fair Value of Pension and Postretirement Benefit Plans Assets	The following table provides information on the fair value of our foreign pension plans assets, as well as the related level within the fair value hierarchy. Investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified by level in the fair value hierarchy. December 31, 2016 December 31, 2015 Fair Value Measurements Using Fair Value Measurements Using (in thousands) Fair Value Level 1 Level 2 Level 3 Fair Value Level 1 Level 2 Level 3 Insurance contract $ 9,399 $ 0 $ 9,399 $ 0 $ 9,139 $ 0 $ 9,139 $ 0 Mutual funds 169 169 0 0 146 146 0 0 Cash and cash equivalents 427 427 0 0 321 321 0 0 Pooled investment funds (measured at net asset value): Equity securities—U.S. companies 9,341 9,522 Equity securities—international companies 64,903 61,588 Debt securities—corporate 284 22,890 Debt securities—government 55,273 28,696 Cash and cash equivalents 349 405 Property 4,732 5,939 $ 144,877 $ 596 $ 9,399 $ 0 $ 138,646 $ 467 $ 9,139 $ 0
Schedule of Expected Benefit Payments	The expected benefit payments for the next ten years for our foreign pension plans are shown in the table below. (in thousands) Expected Pension Benefit Payments 2017 $ 2,975 2018 3,865 2019 3,276 2020 4,555 2021 3,683 2022 through 2026 22,336

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of Income Before Income Tax Expense	Our income before income tax expense, as well as our provision for income taxes is shown in the table below. Years Ended December 31, (in thousands) 2016 2015 2014 Income before income tax expense Domestic $ 161,687 $ 229,561 $ 226,777 Foreign 181,521 109,410 112,322 $ 343,208 $ 338,971 $ 339,099 Income tax expense Current income taxes Federal $ 34,213 $ 62,491 $ 61,866 State 9,020 11,216 13,763 Foreign 37,349 26,511 22,007 80,582 100,218 97,636 Deferred income taxes Federal 13,876 1,287 5,199 State 3,095 (936 ) 774 Foreign 2,214 (201 ) 2,235 19,185 150 8,208 Total income tax expense $ 99,767 $ 100,368 $ 105,844
Schedule of Provision for Income Taxes	Our income before income tax expense, as well as our provision for income taxes is shown in the table below. Years Ended December 31, (in thousands) 2016 2015 2014 Income before income tax expense Domestic $ 161,687 $ 229,561 $ 226,777 Foreign 181,521 109,410 112,322 $ 343,208 $ 338,971 $ 339,099 Income tax expense Current income taxes Federal $ 34,213 $ 62,491 $ 61,866 State 9,020 11,216 13,763 Foreign 37,349 26,511 22,007 80,582 100,218 97,636 Deferred income taxes Federal 13,876 1,287 5,199 State 3,095 (936 ) 774 Foreign 2,214 (201 ) 2,235 19,185 150 8,208 Total income tax expense $ 99,767 $ 100,368 $ 105,844
Reconciliation Of U.S. Federal Statutory Rate To Effective Income Tax Rate	The reconciliation of the U.S. federal statutory rate to the effective income tax rate follows: % of Income Before Income Tax Expense 2016 2015 2014 Federal statutory rate 35.0 % 35.0 % 35.0 % State taxes, net of federal tax 2.3 2.0 2.8 Foreign operations (5.8 ) (4.3 ) (4.3 ) Domestic research tax credit (1.2 ) (1.2 ) (1.0 ) Domestic manufacturing tax benefit (0.8 ) (1.9 ) (2.0 ) Other items and adjustments (0.4 ) 0.0 0.7 Effective income tax rate 29.1 % 29.6 % 31.2 %
Schedule of Deferred Income Tax Assets and Liabilities	Our deferred income tax assets and liabilities follow. December 31, (in thousands) 2016 2015 Deferred income tax assets Future employee benefits $ 30,178 $ 31,932 Environmental and future shutdown reserves 5,737 6,051 Loss on derivatives 0 8,454 Trademark expenses 5,810 5,747 Foreign currency translation adjustments 6,687 7,489 Other 7,458 6,720 55,870 66,393 Deferred income tax liabilities Depreciation and amortization 29,736 25,119 Other 6,305 6,201 36,041 31,320 Net deferred income tax assets $ 19,829 $ 35,073 Reconciliation to financial statements Deferred income tax assets $ 29,063 $ 44,729 Deferred income tax liabilities 9,234 9,656 Net deferred income tax assets $ 19,829 $ 35,073
Schedule of Reconciliation Of Unrecognized Tax Benefits	A reconciliation of the beginning and ending balances of the unrecognized tax benefits from uncertain positions is as follows: December 31, (in thousands) 2016 2015 2014 Balance at beginning of year $ 2,322 $ 1,465 $ 3,321 Increases for tax positions of prior years 773 1,035 730 Decreases for tax positions of prior years 0 0 (882 ) Increases for tax positions of the current year 5,826 533 425 Settlements (111 ) (497 ) (1,509 ) Lapses of statutes 0 (214 ) (620 ) Balance at end of year $ 8,810 $ 2,322 $ 1,465

Other Comprehensive Income (L51

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Components of Accumulated Other Comprehensive Loss, Net of Tax	The balances of, and changes in, the components of accumulated other comprehensive loss, net of tax, consist of the following: (in thousands) Pension Plans Foreign Currency Translation Adjustments Accumulated Other Balance at December 31, 2013 $ (44,493 ) $ (15,593 ) $ (60,086 ) Other comprehensive income (loss) before reclassifications (54,473 ) (28,448 ) (82,921 ) Amounts reclassified from accumulated other comprehensive loss (a) 3,847 0 3,847 Other comprehensive income (loss) (50,626 ) (28,448 ) (79,074 ) Balance at December 31, 2014 (95,119 ) (44,041 ) (139,160 ) Other comprehensive income (loss) before reclassifications 20,524 (30,687 ) (10,163 ) Amounts reclassified from accumulated other comprehensive loss (a) 4,797 0 4,797 Other comprehensive income (loss) 25,321 (30,687 ) (5,366 ) Balance at December 31, 2015 (69,798 ) (74,728 ) (144,526 ) Other comprehensive income (loss) before reclassifications (8,565 ) (31,595 ) (40,160 ) Amounts reclassified from accumulated other comprehensive loss (a) 2,176 0 2,176 Other comprehensive income (loss) (6,389 ) (31,595 ) (37,984 ) Balance at December 31, 2016 $ (76,187 ) $ (106,323 ) $ (182,510 ) (a) The pension plan and other postretirement benefit components of accumulated other comprehensive loss are included in the computation of net periodic benefit cost (income). See Note 17 for further information.

Segment and Geographic Area I52

Segment and Geographic Area Information (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Schedule of Net Sales by Segment	The table below reports net sales and operating profit by segment, as well as a reconciliation to income before income tax expense, for the last three years. Years Ended December 31, (in thousands) 2016 2015 2014 Net sales Petroleum additives Lubricant additives $ 1,672,523 $ 1,740,956 $ 1,901,279 Fuel additives 362,122 384,039 423,803 Total 2,034,645 2,124,995 2,325,082 All other 14,806 15,835 10,323 Net sales (a) $ 2,049,451 $ 2,140,830 $ 2,335,405 Segment operating profit Petroleum additives $ 384,906 $ 374,934 $ 385,084 All other 530 4,372 1,279 Segment operating profit 385,436 379,306 386,363 Corporate, general, and administrative expenses (21,783 ) (22,779 ) (23,397 ) Interest and financing expenses, net (16,785 ) (14,652 ) (16,567 ) Other income (expense), net (3,660 ) (2,904 ) (7,300 ) Income before income tax expense $ 343,208 $ 338,971 $ 339,099 (a) Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014 . Sales to Shell amounted $261 million ( 11% of consolidated net sales) in 2014 . These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.
Schedule Of Segment Operating Profit	The table below reports net sales and operating profit by segment, as well as a reconciliation to income before income tax expense, for the last three years. Years Ended December 31, (in thousands) 2016 2015 2014 Net sales Petroleum additives Lubricant additives $ 1,672,523 $ 1,740,956 $ 1,901,279 Fuel additives 362,122 384,039 423,803 Total 2,034,645 2,124,995 2,325,082 All other 14,806 15,835 10,323 Net sales (a) $ 2,049,451 $ 2,140,830 $ 2,335,405 Segment operating profit Petroleum additives $ 384,906 $ 374,934 $ 385,084 All other 530 4,372 1,279 Segment operating profit 385,436 379,306 386,363 Corporate, general, and administrative expenses (21,783 ) (22,779 ) (23,397 ) Interest and financing expenses, net (16,785 ) (14,652 ) (16,567 ) Other income (expense), net (3,660 ) (2,904 ) (7,300 ) Income before income tax expense $ 343,208 $ 338,971 $ 339,099 (a) Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014 . Sales to Shell amounted $261 million ( 11% of consolidated net sales) in 2014 . These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.
Schedule Of Asset Information By Segment	The following tables show asset information by segment and the reconciliation to consolidated assets. Segment assets consist of accounts receivable, inventory, and long-lived assets. Long-lived assets included in the petroleum additives segment amounts in the table below include property, plant, and equipment, net of depreciation, as well as intangibles (net of amortization) and goodwill. The additions to long-lived assets include only property, plant, and equipment for each year presented. December 31, (in thousands) 2016 2015 Segment assets Petroleum additives $ 1,083,585 $ 1,011,047 All other 16,019 14,324 1,099,604 1,025,371 Cash and cash equivalents 192,154 93,424 Other accounts receivable 7,547 4,184 Deferred income taxes 29,063 44,729 Prepaid expenses and other current assets 26,301 35,370 Non-segment property, plant, and equipment, net 29,870 29,640 Prepaid pension cost 25,800 20,430 Deferred charges and other assets 6,097 33,101 Total assets $ 1,416,436 $ 1,286,249
Additions To Long-lived Assets And Depreciation And Amortization By Segment	Years Ended December 31, (in thousands) 2016 2015 2014 Additions to long-lived assets Petroleum additives $ 145,768 $ 124,605 $ 57,065 All other 21 22 0 Corporate 1,895 1,872 2,651 Total additions to long-lived assets $ 147,684 $ 126,499 $ 59,716 Depreciation and amortization Petroleum additives $ 42,128 $ 39,365 $ 38,844 All other 15 12 27 Corporate 2,750 2,888 2,667 Total depreciation and amortization $ 44,893 $ 42,265 $ 41,538
Schedule Of Net Sales, Total Assets, And Long-Lived Assets By Geographic Area	The tables below report net sales, total assets, and long-lived assets by geographic area, as well as by country for those countries with significant net sales or long-lived assets. Since our foreign operations are significant to our overall business, we are also presenting net sales in the table below by the major regions in which we operate. NewMarket assigns net sales to geographic areas based on the location to which the product was shipped to a third party. Long-lived assets in the table below include property, plant, and equipment, net of depreciation. Years Ended December 31, (in thousands) 2016 2015 2014 Net sales United States $ 701,209 $ 775,591 $ 810,766 Europe, Middle East, Africa, India 653,341 669,198 783,988 Asia Pacific 470,616 436,396 471,508 Other foreign 224,285 259,645 269,143 Net sales $ 2,049,451 $ 2,140,830 $ 2,335,405 December 31, (in thousands) 2016 2015 Total assets United States $ 539,792 $ 581,549 Foreign 876,644 704,700 Total assets $ 1,416,436 $ 1,286,249 Long-lived assets United States $ 224,790 $ 197,724 Singapore 189,485 113,219 Other foreign 89,470 91,503 Total long-lived assets $ 503,745 $ 402,446

Selected Quarterly Consolidat53

Selected Quarterly Consolidated Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Selected Quarterly Financial Information [Abstract]
Schedule Of Selected Quarterly Consolidated Financial Data (unaudited)	(in thousands, except per-share amounts) First Quarter Second Quarter Third Quarter Fourth Quarter 2016 Net sales $ 509,927 $ 521,807 $ 516,090 $ 501,627 Gross profit 175,550 178,400 177,401 149,410 Net income 61,931 64,389 71,449 45,672 Earnings per share - basic and diluted 5.22 5.43 6.03 3.86 2015 First Quarter Second Quarter Third Quarter Fourth Quarter Net sales $ 559,566 $ 560,709 $ 540,933 $ 479,622 Gross profit 181,272 169,708 174,771 153,305 Net income 63,947 58,733 62,009 53,914 Earnings per share - basic and diluted 5.14 4.72 5.08 4.50

Summary of Significant Accoun54

Summary of Significant Accounting Policies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)company	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of operating companies under parent company | company	3
Foreign currency transaction adjustments	$ 5	$ (11)	$ (4)
Contributions by employer for employee savings plans	7	6	6
Undistributed earnings of foreign subsidiaries	$ 537	$ 436	$ 363
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents maturity, days	90 days

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Anti-dilutive shares that were excluded from the calculation of diluted earnings per share (in shares)									18,114	27,434	30,521
Earnings per share numerator:
Net income attributable to common shareholders before allocation of earnings to participating securities	$ 45,672	$ 71,449	$ 64,389	$ 61,931	$ 53,914	$ 62,009	$ 58,733	$ 63,947	$ 243,441	$ 238,603	$ 233,255
Earnings allocated to participating securities									477	482	391
Net income attributable to common shareholders after allocation of earnings to participating securities									$ 242,964	$ 238,121	$ 232,864
Earnings per share denominator:
Weighted-average number of shares of common stock outstanding - basic and diluted (in shares)									11,828,000	12,241,000	12,671,000
Earnings per share - basic and diluted (in dollars per share)	$ 3.86	$ 6.03	$ 5.43	$ 5.22	$ 4.50	$ 5.08	$ 4.72	$ 5.14	$ 20.54	$ 19.45	$ 18.38

Supplemental Cash Flow Inform56

Supplemental Cash Flow Information (Schedule Of Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash paid during the year for
Interest and financing expenses (net of capitalization)	$ 18,775	$ 16,193	$ 16,223
Income taxes	60,998	99,006	112,289
Supplemental disclosure of non-cash transactions
Release of deposit account funds to terminate interest rate swap	21,868	0	0
Non-cash additions to property, plant, and equipment	8,762	13,959	5,933
Non-cash obligation under capital lease	$ 4,810	$ 0	$ 0

Trade and Other Accounts Rece57

Trade and Other Accounts Receivable, Net (Schedule Of Trade And Other Accounts Receivable, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Trade receivables	$ 265,991	$ 252,699
Income tax receivables	26,189	20,141
Other	14,736	15,127
Trade and other accounts receivable, net	$ 306,916	$ 287,967

Inventories (Narrative) (Detail

Inventories (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory [Line Items]
U.S. inventories, LIFO basis	$ 130,000	$ 147,000
LIFO inventories amount below replacement cost	39,000	36,000
Inventories	311,512	351,631
Foreign [Member]
Inventory [Line Items]
Inventories	$ 176,000	$ 196,000

Inventories (Schedule Of Invent

Inventories (Schedule Of Inventories) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Finished goods and work-in-process	$ 254,068	$ 292,978
Raw materials	45,581	48,728
Stores, supplies, and other	11,863	9,925
Inventories	$ 311,512	$ 351,631

Prepaid Expenses and Other Cu60

Prepaid Expenses and Other Current Assets (Schedule Of Prepaid Expenses And Other Current Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract]
Dividend funding	$ 17,478	$ 17,594
Income taxes on intercompany profit	3,954	12,310
Other	4,869	5,466
Prepaid expenses and other current assets	$ 26,301	$ 35,370

Property, Plant, and Equipmen61

Property, Plant, and Equipment, at Cost (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 42	$ 35	$ 34

Property, Plant, and Equipmen62

Property, Plant, and Equipment, at Cost (Schedule Of Property, Plant, And Equipment, At Cost) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 40,190	$ 41,101
Land improvements	44,048	32,074
Leasehold improvements	1,510	1,516
Buildings	161,512	156,555
Machinery and equipment	915,423	774,857
Construction in progress	102,274	122,886
Property, plant, and equipment, at cost	$ 1,264,957	$ 1,128,989

Property, Plant, and Equipmen63

Property, Plant, and Equipment, at Cost (Schedule Of Useful Lives Of Property, Plant, And Equipment) (Details)	12 Months Ended
	Dec. 31, 2016
Minimum [Member] | Land Improvements [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	5 years
Minimum [Member] | Buildings [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	10 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	3 years
Maximum [Member] | Land Improvements [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	30 years
Maximum [Member] | Buildings [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	48 years
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment, at Cost [Line Items]
Property, plant, and equipment, useful lives (in years)	20 years

Intangibles (Net of Amortizat64

Intangibles (Net of Amortization) and Goodwill (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Intangibles (net of amortization) and Goodwill [Line Items]
Intangibles (net of amortization) and goodwill	$ 10,436,000	$ 10,907,000
Accumulated goodwill impairment	$ 0	$ 0
Contracts [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Estimated economic life, in years	10 years
Customer Bases [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Estimated economic life, in years	20 years
Formulas and Technology [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Estimated economic life, in years	10 years
Trademarks and Trade Names [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Estimated economic life, in years	10 years

Intangibles (Net of Amortizat65

Intangibles (Net of Amortization) and Goodwill (Schedule Of Information Related To Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangibles (net of amortization) and Goodwill [Line Items]
Amortizing intangible assets, Accumulated Amortization	$ 6,988	$ 95,514
Goodwill, Gross Carrying Amount	4,295	4,656
Amortizing intangible assets and Goodwill, Gross Carrying Amount	17,424	106,421
Aggregate amortization expense	1,860	5,704	$ 6,000
Formulas and Technology [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Amortizing intangible assets, Gross Carrying Amount	2,678	88,763
Amortizing intangible assets, Accumulated Amortization	1,958	86,861
Contracts [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Amortizing intangible assets, Gross Carrying Amount	2,000	4,476
Amortizing intangible assets, Accumulated Amortization	0	4,103
Customer Bases [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Amortizing intangible assets, Gross Carrying Amount	6,938	6,977
Amortizing intangible assets, Accumulated Amortization	3,961	3,627
Trademarks and Trade Names [Member]
Intangibles (net of amortization) and Goodwill [Line Items]
Amortizing intangible assets, Gross Carrying Amount	1,513	1,549
Amortizing intangible assets, Accumulated Amortization	$ 1,069	$ 923

Intangibles (Net of Amortizat66

Intangibles (Net of Amortization) and Goodwill (Schedule Of Estimated Annual Amortization Expense Related To Intangible Assets) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,017	$ 864
2,018	834
2,019	813
2,020	504
2,021	$ 440

Deferred Charges and Other As67

Deferred Charges and Other Assets (Schedule Of Deferred Charges And Other Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Charges and Other Assets [Line Items]
Asbestos insurance receivables	$ 4,147	$ 5,244
Deferred financing costs, net of amortization	1,414	1,914
Interest rate swap deposits	0	26,130
Other	4,948	6,057
Deferred charges and other assets	$ 10,509	$ 39,345
4.10% Senior Notes [Member]
Deferred Charges and Other Assets [Line Items]
Senior notes, interest rate	4.10%	4.10%

Accrued Expenses (Schedule Of A

Accrued Expenses (Schedule Of Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Employee benefits, payroll, and related taxes	$ 33,019	$ 30,562
Customer rebates	20,944	21,290
Capital projects	18,779	13,927
Taxes other than income and payroll	6,046	7,216
Other	25,294	26,516
Accrued expenses	$ 104,082	$ 99,511

Long-term Debt (Narrative) (Det

Long-term Debt (Narrative) (Details)	Jan. 04, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2012USD ($)	Dec. 20, 2012
4.10% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes, interest rate		4.10%	4.10%
Debt instrument, maturity date		2,022	2,022
Principal amount of debt issued		$ 350,000,000
4.10% senior notes issue price						99.83%
Financing costs incurred					$ 5,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Financing costs incurred				$ 2,500,000
Term of credit facility		5 years
Maximum borrowing capacity		$ 650,000,000	$ 650,000,000
Increase in aggregate amount of revolving credit facility allowed		$ 150,000,000
Revolving credit facility, maturity date		Oct. 28, 2019
Basis spread on federal funds effective rate		0.50%
Basis spread on adjusted LIBO rate		1.00%
Maximum Consolidated Leverage Ratio		3.50
Minimum Consolidated Interest Coverage Ratio		3
Average interest rate during period		1.90%	1.90%
Average interest rate at period end		2.10%	2.10%
Revolving Credit Facility [Member] | Letters of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 75,000,000
Revolving Credit Facility [Member] | Multicurrency Borrowings [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		100,000,000
Revolving Credit Facility [Member] | Swingline Loans [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 20,000,000
Revolving Credit Facility [Member] | Loans Bearing Interest Based On ABR [Member]
Debt Instrument [Line Items]
Applicable Rate		0.25%
Revolving Credit Facility [Member] | Loans Bearing Interest Based On ABR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable Rate		0.00%
Revolving Credit Facility [Member] | Loans Bearing Interest Based On ABR [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable Rate		0.50%
Revolving Credit Facility [Member] | Loans Bearing Interest Based On Adjusted LIBO Rate [Member]
Debt Instrument [Line Items]
Applicable Rate		1.25%
Revolving Credit Facility [Member] | Loans Bearing Interest Based On Adjusted LIBO Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable Rate		1.00%
Revolving Credit Facility [Member] | Loans Bearing Interest Based On Adjusted LIBO Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable Rate		1.50%
3.78% Senior Notes [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	3.78%
Principal amount of debt issued	$ 250,000,000
Annual principal payments	$ 50,000,000

Long-term Debt (Schedule Of Lon

Long-term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Outstanding borrowings	$ 507,275	$ 490,920
4.10% Senior Notes [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 346,505	$ 345,920
Senior notes, interest rate	4.10%	4.10%
Debt instrument, maturity date	2,022	2,022
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 156,000	$ 145,000
Capital Lease Obligation [Member]
Debt Instrument [Line Items]
Outstanding borrowings	$ 4,770	$ 0

Long-term Debt (Schedule Of Unu

Long-term Debt (Schedule Of Unused Portion Of Revolving Credit Facility) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Outstanding borrowings	$ 507,275,000	$ 490,920,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under the revolving credit facility	650,000,000	650,000,000
Outstanding borrowings	156,000,000	145,000,000
Outstanding letters of credit	3,483,000	2,895,000
Unused portion of revolving credit facility	$ 490,517,000	$ 502,105,000

Other Noncurrent Liabilities (S

Other Noncurrent Liabilities (Schedule Of Other Noncurrent Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities, Noncurrent [Abstract]
Employee benefits	$ 81,377	$ 77,413
Environmental remediation	13,796	14,907
Asbestos litigation reserve	9,710	9,571
Deferred income taxes	9,234	9,656
Interest rate swaps	0	19,494
Other	17,203	13,044
Other noncurrent liabilities	$ 131,320	$ 144,085

Stock-based Compensation (Narra

Stock-based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)directorshares	Dec. 31, 2015USD ($)$ / shares	Dec. 31, 2014USD ($)$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive stock option, exercise period, maximum, in years	10 years
Maximum number of shares, options, SARs, or stock units granted or awarded in calendar year per participant	200,000
Maximum aggregate number of shares of common stock that may be issued under the Plan	1,000,000
Shares available for grant (in shares)	981,067
Restricted Stock And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards weighted average grant date fair value (in dollars per share) | $ / shares		$ 375.57	$ 381.99
Fair value of shares vested | $	$ 3	$ 4
Compensation expense | $	3	$ 2	$ 2
Unrecognized compensation expense | $	$ 3
Period for recognition of unrecognized compensation expense, in years	1 year 8 months
Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted (in shares)	720
Number of non-employee directors | director	5

Stock-based Compensation (Sched

Stock-based Compensation (Schedule of Restricted Stock And Restricted Stock Unit Activity) (Details) - Restricted Stock And Restricted Stock Units [Member]	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Number of Shares
Stock awards at beginning of year (in shares) | shares	27,434
Vested in 2016 (in shares) | shares	7,575
Forfeited in 2016 (in shares) | shares	1,745
Stock awards at end of year (in shares) | shares	18,114
Weighted Average Grant-Date Fair Value
Sock awards at beginning of year (in dollars per share) | $ / shares	$ 359.48
Vested in 2016 (in dollars per share) | $ / shares	314.19
Forfeited in 2016 (in dollars per share) | $ / shares	351.29
Stock awards at end of year (in dollars per share) | $ / shares	$ 379.22

Derivatives and Hedging Activ75

Derivatives and Hedging Activities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Release of deposit account funds to terminate interest rate swap	$ 21,868	$ 0	$ 0
Cash collateral deposit	0	26,130
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of non-designated hedges of interest rate swap	97,000
Release of deposit account funds to terminate interest rate swap	$ 21,868
Rate of fixed-rate payments for interest rate swap	5.3075%
Cash collateral deposit		$ 26,130

Derivatives and Hedging Activ76

Derivatives and Hedging Activities (Fair Value Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Interest Rate Swap [Member] | Accrued Expenses And Oher Noncurrent Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of interest rate swap liability derivatives, not designated as hedging instruments	$ 0	$ 21,734

Derivatives and Hedging Activ77

Derivatives and Hedging Activities (Effect Of Derivative Instruments On The Consolidated Statements Of Income Non-Designated Derivatives)(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest Rate Swap [Member] | Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (4,883)	$ (3,221)	$ (7,125)

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Measurements [Line Items]
Cash and cash equivalents, Carrying Amount in Consolidated Balance Sheets	$ 192,154	$ 93,424	$ 103,003	$ 238,703
Cash deposit for collateralized interest rate swap, Carrying Amount in Consolidated Balance Sheets	0	26,130
Carrying Amount in Consolidated Balance Sheets [Member]
Fair Value Measurements [Line Items]
Cash and cash equivalents, Carrying Amount in Consolidated Balance Sheets	192,154	93,424
Interest rate swap liability, Carrying Amount in Consolidated Balance Sheets		21,734
Fair Value [Member]
Fair Value Measurements [Line Items]
Cash and cash equivalents, Fair Value	192,154	93,424
Cash deposit for collateralized interest rate swap, Fair Value		26,130
Interest rate swap liability, Fair Value		21,734
Fair Value, Level 1 [Member]
Fair Value Measurements [Line Items]
Cash and cash equivalents, Fair Value	192,154	93,424
Cash deposit for collateralized interest rate swap, Fair Value		26,130
Interest rate swap liability, Fair Value		0
Fair Value, Level 2 [Member]
Fair Value Measurements [Line Items]
Cash and cash equivalents, Fair Value	0	0
Cash deposit for collateralized interest rate swap, Fair Value		0
Interest rate swap liability, Fair Value		21,734
Fair Value, Level 3 [Member]
Fair Value Measurements [Line Items]
Cash and cash equivalents, Fair Value	$ 0	0
Cash deposit for collateralized interest rate swap, Fair Value		0
Interest rate swap liability, Fair Value		0
Interest Rate Swap [Member]
Fair Value Measurements [Line Items]
Cash deposit for collateralized interest rate swap, Carrying Amount in Consolidated Balance Sheets		$ 26,130

Fair Value Measurements (Estima

Fair Value Measurements (Estimated Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt, Carrying Amount	$ 502,505	$ 490,920
Long-term debt, Fair Value	$ 507,925	$ 515,302
4.10% Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes, interest rate	4.10%	4.10%

Commitments and Contingencies80

Commitments and Contingencies (Contractual Commitments and Purchase Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Contractual Commitments [Abstract]
Operating lease rental expense	$ 33,000	$ 34,000	$ 30,000
2,017	14,235
2,018	11,698
2,019	9,520
2,020	6,796
2,021	4,776
After 2,021	23,515
Inventories [Member]
Purchase Obligations [Abstract]
2,017	150,740
2,018	163,953
2,019	167,368
2,020	151,066
2,021	148,113
After 2,021	239,740
Construction of Assets and Purchases of Property and Equipment [Member]
Contractual Commitments [Abstract]
Contractual purchase obligations	$ 52,000
Period of obligations for construction of assets and purchases of property and equipment	5 years

Commitments and Contingencies81

Commitments and Contingencies (Litigation) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Undiscounted liability related to premises asbestos claims	$ 11	$ 11
Receivable for recoveries related to premises asbestos liabilities	$ 5	$ 6

Commitments and Contingencies82

Commitments and Contingencies (Environmental) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Site Contingency [Line Items]
Accruals for environmental remediation, dismantling, and decontamination	$ 16	$ 17
Former TEL Plant Site Louisiana and Houston, Texas Plant Site [Member]
Site Contingency [Line Items]
Accruals for environmental remediation, dismantling, and decontamination	10	10
Accrual for environmental remediation, dismantling, and decontamination, undiscounted	13	14
Former TEL Plant Site Louisiana [Member]
Site Contingency [Line Items]
Accrual for remediation of groundwater and soil	4	4
Houston, Texas Plant Site [Member]
Site Contingency [Line Items]
Accrual for remediation of groundwater and soil	$ 5	$ 6
Minimum [Member] | Former TEL Plant Site Louisiana and Houston, Texas Plant Site [Member]
Site Contingency [Line Items]
Discount rate	4.00%	3.00%
Maximum [Member] | Former TEL Plant Site Louisiana and Houston, Texas Plant Site [Member]
Site Contingency [Line Items]
Discount rate	9.00%	9.00%

Pension Plans and Other Postr83

Pension Plans and Other Postretirement Benefits (Narrative) (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2016USD ($)plansinvestmentmanagers	Dec. 31, 2015USD ($)	Dec. 31, 2014
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of pension plans | plans		4
Actuarial net loss to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) in next fiscal year		$ (5)
Accumulated benefit obligation		$ 272	$ 251
Expected long-term rate of return on plan assets		8.50%	8.50%	8.50%
Number of investment companies managing pension funds | investmentmanagers		6
Number of business days notice required to make withdrawals		10 days
Estimated contributions to pension plans in next fiscal year		$ 19
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service cost (credit) to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) in next fiscal year		$ (3)
Expected long-term rate of return on plan assets		5.50%	5.50%	5.50%
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial net loss to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) in next fiscal year		$ (1)
Prior service cost (credit) to be amortized from accumulated other comprehensive loss into net periodic benefit cost (income) in next fiscal year		(0.1)
Accumulated benefit obligation		$ 132	$ 125
Expected long-term rate of return on plan assets		5.10%	5.03%	5.66%
Estimated contributions to pension plans in next fiscal year		$ 5
Equities [Member] | U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocation percentage for plan assets		90.00%
Maximum target allocation percentage for plan assets		97.00%
Debt Securities [Member] | U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum target allocation percentage for plan assets		3.00%
Maximum target allocation percentage for plan assets		10.00%
Insurance Contract [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets		6.00%
Pooled Investment Property Fund [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets		5.00%
Scenario, Forecast [Member] | U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets	8.50%
Expected long-term rate for inflation	3.00%
Scenario, Forecast [Member] | Debt Securities [Member] | U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets	4.40%
US Companies [Member] | Scenario, Forecast [Member] | Equities [Member] | U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets	8.50%
Equities [Member] | Pooled Investment Funds [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets		51.00%
Debt Securities [Member] | Pooled Investment Funds [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage for plan assets		38.00%
UNITED KINGDOM | Pooled Investment Funds [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of days per year trades may be made		46 days
Number of business days notice required to make withdrawals		2 days
Unfunded commitments - pooled investment funds		$ 0
CANADA | Pooled Investment Funds [Member] | Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Unfunded commitments - pooled investment funds		$ 0

Pension Plans and Other Postr84

Pension Plans and Other Postretirement Benefits (Summary Of Components Of Net Periodic Benefit Cost (Income)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Pension Benefits [Member]
Net periodic benefit cost (income)
Service cost	$ 12,860	$ 13,034	$ 9,608
Interest cost	13,175	11,938	10,936
Expected return on plan assets	(23,137)	(20,467)	(17,524)
Amortization of prior service cost (credit)	187	99	99
Amortization of actuarial net (gain) loss	5,243	6,891	3,825
Net periodic benefit cost (income)	8,328	11,495	6,944
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Actuarial net (gain) loss	9,140	11,095	56,364
Prior service cost (credit)	749	0	0
Amortization of actuarial net gain (loss)	(5,243)	(6,891)	(3,825)
Amortization of prior service (cost) credit	(187)	(99)	(99)
Total recognized in other comprehensive income (loss)	4,459	4,105	52,440
Total recognized in net periodic benefit cost (income) and other comprehensive income (loss)	12,787	15,600	59,384
U.S. Postretirement Benefits [Member]
Net periodic benefit cost (income)
Service cost	705	2,244	1,849
Interest cost	1,653	2,548	2,739
Expected return on plan assets	(1,239)	(1,288)	(1,311)
Amortization of prior service cost (credit)	(3,028)	(1,008)	9
Amortization of actuarial net (gain) loss	0	0	(713)
Net periodic benefit cost (income)	(1,909)	2,496	2,573
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Actuarial net (gain) loss	156	(1,826)	16,264
Prior service cost (credit)	0	(35,768)	0
Amortization of actuarial net gain (loss)	0	0	713
Amortization of prior service (cost) credit	3,028	1,008	(9)
Total recognized in other comprehensive income (loss)	3,184	(36,586)	16,968
Total recognized in net periodic benefit cost (income) and other comprehensive income (loss)	1,275	(34,090)	19,541
Foreign Pension Benefits [Member]
Net periodic benefit cost (income)
Service cost	6,926	8,150	6,213
Interest cost	4,915	4,932	5,993
Expected return on plan assets	(6,638)	(7,077)	(8,012)
Amortization of prior service cost (credit)	(83)	(95)	(102)
Amortization of actuarial net (gain) loss	1,021	1,587	1,092
Settlements and curtailments	0	0	1,817
Net periodic benefit cost (income)	6,141	7,497	7,001
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Actuarial net (gain) loss	3,215	(5,461)	13,004
Settlements and curtailments	0	0	(1,069)
Amortization of actuarial net gain (loss)	(1,021)	(1,587)	(1,092)
Amortization of prior service (cost) credit	83	95	102
Total recognized in other comprehensive income (loss)	2,277	(6,953)	10,945
Total recognized in net periodic benefit cost (income) and other comprehensive income (loss)	$ 8,418	$ 544	$ 17,946

Pension Plans and Other Postr85

Pension Plans and Other Postretirement Benefits (Changes In The Plans' Benefit Obligations And Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the Consolidated Balance Sheets
Noncurrent assets	$ 25,800	$ 20,430
U.S. Pension Benefits [Member]
Change in benefit obligation
Benefit obligation at beginning of year	292,728	291,119
Service cost	12,860	13,034	$ 9,608
Interest cost	13,175	11,938	10,936
Actuarial net (gain) loss	6,087	(14,718)
Plan amendment	748	0
Benefits paid	(9,232)	(8,645)
Benefit obligation at end of year	316,366	292,728	291,119
Change in plan assets
Fair value of plan assets at beginning of year	260,911	255,571
Actual return on plan assets	20,083	(5,346)
Employer contributions	19,330	19,331
Benefits paid	(9,232)	(8,645)
Fair value of plan assets at end of year	291,092	260,911	255,571
Funded status	(25,274)	(31,817)
Amounts recognized in the Consolidated Balance Sheets
Noncurrent assets	15,188	7,297
Current liabilities	(2,781)	(2,735)
Noncurrent liabilities	(37,681)	(36,379)
Amounts recognized in the Consolidated Balance Sheets	(25,274)	(31,817)
Amounts recognized in accumulated other comprehensive loss
Actuarial net (gain) loss	107,061	103,164
Prior service cost (credit)	58	(504)
Amounts recognized in accumulated other comprehensive loss	107,119	102,660
U.S. Postretirement Benefits [Member]
Change in benefit obligation
Benefit obligation at beginning of year	38,517	74,203
Service cost	705	2,244	1,849
Interest cost	1,653	2,548	2,739
Actuarial net (gain) loss	(322)	(1,884)
Plan amendment	0	(35,770)
Benefits paid	(2,443)	(2,824)
Benefit obligation at end of year	38,110	38,517	74,203
Change in plan assets
Fair value of plan assets at beginning of year	23,972	24,270
Actual return on plan assets	761	1,228
Employer contributions	948	1,298
Benefits paid	(2,443)	(2,824)
Fair value of plan assets at end of year	23,238	23,972	24,270
Funded status	(14,872)	(14,545)
Amounts recognized in the Consolidated Balance Sheets
Noncurrent assets	0	0
Current liabilities	(1,313)	(1,396)
Noncurrent liabilities	(13,559)	(13,149)
Amounts recognized in the Consolidated Balance Sheets	(14,872)	(14,545)
Amounts recognized in accumulated other comprehensive loss
Actuarial net (gain) loss	(925)	(1,081)
Prior service cost (credit)	(31,732)	(34,760)
Amounts recognized in accumulated other comprehensive loss	(32,657)	(35,841)
Foreign Pension Benefits [Member]
Change in benefit obligation
Benefit obligation at beginning of year	146,748	158,279
Service cost	6,926	8,150	6,213
Interest cost	4,915	4,932	5,993
Employee contributions	832	917
Actuarial net (gain) loss	25,794	(10,736)
Benefits paid	(3,501)	(5,203)
Foreign currency translation	(24,613)	(9,591)
Benefit obligation at end of year	157,101	146,748	158,279
Change in plan assets
Fair value of plan assets at beginning of year	138,646	142,986
Actual return on plan assets	29,026	1,923
Employer contributions	5,441	5,981
Employee contributions	832	917
Benefits paid	(3,501)	(5,203)
Foreign currency translation	(25,567)	(7,958)
Fair value of plan assets at end of year	144,877	138,646	$ 142,986
Funded status	(12,224)	(8,102)
Amounts recognized in the Consolidated Balance Sheets
Noncurrent assets	10,612	13,133
Current liabilities	(295)	(302)
Noncurrent liabilities	(22,541)	(20,933)
Amounts recognized in the Consolidated Balance Sheets	(12,224)	(8,102)
Amounts recognized in accumulated other comprehensive loss
Actuarial net (gain) loss	42,809	40,615
Prior service cost (credit)	39	(44)
Transition obligation	10	10
Amounts recognized in accumulated other comprehensive loss	$ 42,858	$ 40,581

Pension Plans and Other Postr86

Pension Plans and Other Postretirement Benefits (Pension Plans With The Benefit Obligation In Excess Of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
U.S. Pension Benefits [Member]
Plans with the accumulated benefit obligation in excess of the fair market value of plan assets
Projected benefit obligation	$ 40,462	$ 37,637
Accumulated benefit obligation	35,939	34,526
Fair market value of plan assets	0	0
Plans with the projected benefit obligation in excess of the fair market value of plan assets
Projected benefit obligation	40,462	232,849
Fair market value of plan assets	0	193,736
Foreign Pension Benefits [Member]
Plans with the accumulated benefit obligation in excess of the fair market value of plan assets
Projected benefit obligation	32,407	30,521
Accumulated benefit obligation	21,310	20,005
Fair market value of plan assets	9,568	9,286
Plans with the projected benefit obligation in excess of the fair market value of plan assets
Projected benefit obligation	32,407	30,521
Fair market value of plan assets	$ 9,568	$ 9,286

Pension Plans and Other Postr87

Pension Plans and Other Postretirement Benefits (Assumptions To Calculate The Results Of Our Retirement Plans) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Pension Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost (income)
Discount rate	4.50%	4.125%	5.00%
Expected long-term rate of return on plan assets	8.50%	8.50%	8.50%
Rate of projected compensation increase	3.50%	3.50%	3.50%
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.25%	4.50%	4.125%
Rate of projected compensation increase	3.50%	3.50%	3.50%
U.S. Postretirement Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost (income)
Discount rate	4.50%	4.125%	5.00%
Expected long-term rate of return on plan assets	5.50%	5.50%	5.50%
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.25%	4.50%	4.125%
Foreign Pension Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost (income)
Discount rate	3.58%	3.11%	4.01%
Expected long-term rate of return on plan assets	5.10%	5.03%	5.66%
Rate of projected compensation increase	4.28%	4.27%	4.25%
Weighted-average assumptions used to determine benefit obligations
Discount rate	2.53%	3.58%	3.11%
Rate of projected compensation increase	4.20%	4.28%	4.27%

Pension Plans and Other Postr88

Pension Plans and Other Postretirement Benefits (Fair Value Of The Pension And Postretirement Benefit Plans Assets By Asset Category) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 291,092	$ 260,911	$ 255,571
U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	270,328	240,663
U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Money Market Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,120	5,854
U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,927
U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	984	919
U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Money Market Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	984	919
U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Money Market Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Pension Benefits [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	291,092	260,911
U.S. Pension Benefits [Member] | Fair Value [Member] | Money Market Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,120	5,854
U.S. Pension Benefits [Member] | Fair Value [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1,927
U.S. Pension Benefits [Member] | Fair Value [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	984	919
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,238	23,972	24,270
U.S. Postretirement Benefits [Member] | Fair Value, Level 1 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Postretirement Benefits [Member] | Fair Value, Level 2 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,238	23,972
U.S. Postretirement Benefits [Member] | Fair Value, Level 3 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. Postretirement Benefits [Member] | Fair Value [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,238	23,972
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	144,877	138,646	$ 142,986
Foreign Pension Benefits [Member] | Fair Value, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	596	467
Foreign Pension Benefits [Member] | Fair Value, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	427	321
Foreign Pension Benefits [Member] | Fair Value, Level 1 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	169	146
Foreign Pension Benefits [Member] | Fair Value, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,399	9,139
Foreign Pension Benefits [Member] | Fair Value, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 2 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,399	9,139
Foreign Pension Benefits [Member] | Fair Value, Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 3 [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value, Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign Pension Benefits [Member] | Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	144,877	138,646
Foreign Pension Benefits [Member] | Fair Value [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	427	321
Foreign Pension Benefits [Member] | Fair Value [Member] | Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,399	9,139
Foreign Pension Benefits [Member] | Fair Value [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	169	146
U.S companies member | U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	232,895	211,471
U.S companies member | U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S companies member | U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S companies member | U.S. Pension Benefits [Member] | Fair Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	232,895	211,471
Foreign [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,757	9,512
Foreign [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Foreign [Member] | U.S. Pension Benefits [Member] | Fair Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,757	9,512
Real Estate Investment Trusts [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,653	3,339
Real Estate Investment Trusts [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate Investment Trusts [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate Investment Trusts [Member] | U.S. Pension Benefits [Member] | Fair Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,653	3,339
Fixed Income Securities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,799	8,560
Fixed Income Securities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Securities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed Income Securities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,799	8,560
International Equities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 1 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,104	0
International Equities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 2 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Equities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value, Level 3 [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International Equities—Mutual Funds [Member] | U.S. Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,104	0
Equity Securities—U.S. Companies [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,341	9,522
Equity Securities—International Companies [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64,903	61,588
Debt Securities - Corporate [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	284	22,890
Debt Securities - Government [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55,273	28,696
Cash and Cash Equivalents [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	349	405
Property [Member] | Foreign Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,732	5,939
Common Collective Trust Measured at Net Asset Value [Member] | U.S. Pension Benefits [Member] | Fair Value [Member] | Pooled Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 19,780	$ 19,329

Pension Plans and Other Postr89

Pension Plans and Other Postretirement Benefits (Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2016USD ($)
U.S. Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	$ 10,785
2,018	11,614
2,019	12,505
2,020	13,271
2,021	14,141
2022 through 2026	85,936
U.S. Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	2,908
2,018	2,737
2,019	2,590
2,020	2,449
2,021	2,330
2022 through 2026	10,400
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	2,975
2,018	3,865
2,019	3,276
2,020	4,555
2,021	3,683
2022 through 2026	$ 22,336

Other Income (Expense), Net (De

Other Income (Expense), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Nonoperating Income (Expense) [Abstract]
Other income (expense), net	$ (2,697)	$ (3,097)	$ (7,054)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate if recognized	$ 8
Minimum [Member]
Income Tax Contingency [Line Items]
Foreign and United States jurisdictions, period of statutes of limitations, years	3 years
Maximum [Member]
Income Tax Contingency [Line Items]
Foreign and United States jurisdictions, period of statutes of limitations, years	5 years

Income Taxes (Schedule Of Incom

Income Taxes (Schedule Of Income Before Income Tax Expense and Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income before income tax expense
Domestic	$ 161,687	$ 229,561	$ 226,777
Foreign	181,521	109,410	112,322
Income before income tax expense	343,208	338,971	339,099
Current income taxes
Federal	34,213	62,491	61,866
State	9,020	11,216	13,763
Foreign	37,349	26,511	22,007
Current income taxes	80,582	100,218	97,636
Deferred income taxes
Federal	13,876	1,287	5,199
State	3,095	(936)	774
Foreign	2,214	(201)	2,235
Deferred income taxes	19,185	150	8,208
Total income tax expense	$ 99,767	$ 100,368	$ 105,844

Income Taxes (Reconciliation Of

Income Taxes (Reconciliation Of U.S. Federal Statutory Rate To Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax	2.30%	2.00%	2.80%
Foreign operations	(5.80%)	(4.30%)	(4.30%)
Domestic research tax credit	(1.20%)	(1.20%)	(1.00%)
Domestic manufacturing tax benefit	(0.80%)	(1.90%)	(2.00%)
Other items and adjustments	(0.40%)	0.00%	0.70%
Effective income tax rate	29.10%	29.60%	31.20%

Income Taxes (Deferred Income T

Income Taxes (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred income tax assets
Future employee benefits	$ 30,178	$ 31,932
Environmental and future shutdown reserves	5,737	6,051
Loss on derivatives	0	8,454
Trademark expenses	5,810	5,747
Foreign currency translation adjustments	6,687	7,489
Other	7,458	6,720
Deferred income tax assets	55,870	66,393
Deferred income tax liabilities
Depreciation and amortization	29,736	25,119
Other	6,305	6,201
Deferred income tax liabilities	36,041	31,320
Net deferred income tax assets	19,829	35,073
Deferred income tax assets	29,063	44,729
Deferred income tax liabilities	$ 9,234	$ 9,656

Income Taxes (Schedule of Recon

Income Taxes (Schedule of Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 2,322	$ 1,465	$ 3,321
Increases for tax positions of prior years	773	1,035	730
Decreases for tax positions of prior years	0	0	(882)
Increases for tax positions of the current year	5,826	533	425
Settlements	(111)	(497)	(1,509)
Lapses of statutes	0	(214)	(620)
Balance at end of year	$ 8,810	$ 2,322	$ 1,465

Other Comprehensive Income (L96

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Pension Plans and Other Postretirement Benefits, Beginning Balance		$ (69,798)	$ (95,119)	$ (44,493)
Foreign Currency Translation Adjustments, Beginning Balance		(74,728)	(44,041)	(15,593)
Accumulated Other Comprehensive (Loss) Income, Beginning Balance		(144,526)	(139,160)	(60,086)
Other comprehensive income (loss) before reclassifications, Pension Plans and Other Postretirement Benefits		(8,565)	20,524	(54,473)
Other comprehensive income (loss) before reclassifications, Foreign Currency Translation Adjustments		(31,595)	(30,687)	(28,448)
Other comprehensive income (loss) before reclassifications, Accumulated Other Comprehensive (Loss) Income		(40,160)	(10,163)	(82,921)
Amounts reclassified from accumulated other comprehensive loss, Pension Plans and Other Postretirement Benefits	[1]	2,176	4,797	3,847
Amounts reclassified from accumulated other comprehensive loss, Foreign Currency Translation Adjustments		0	0	0
Amounts reclassified from accumulated other compehensive loss, Accumulated Other Comprehensive (Loss) Income		2,176	4,797	3,847
Total pension plans and other postretirement benefits		(6,389)	25,321	(50,626)
Foreign Currency Translation Adjustments, Other comprehensive income (loss)		(31,595)	(30,687)	(28,448)
Other comprehensive income (loss)		(37,984)	(5,366)	(79,074)
Pension Plans and Other Postretirement Benefits, Ending Balance		(76,187)	(69,798)	(95,119)
Foreign Currency Translation Adjustments, Ending Balance		(106,323)	(74,728)	(44,041)
Accumulated Other Comprehensive (Loss) Income, Ending Balance		$ (182,510)	$ (144,526)	$ (139,160)
[1]	(a) The pension plan and other postretirement benefit components of accumulated other comprehensive loss are included in the computation of net periodic benefit cost (income). See Note 17 for further information.

Segment and Geographic Area I97

Segment and Geographic Area Information (Schedule Of Net Sales And Operating Profit By Segment) (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2016USD ($)customer	Dec. 31, 2015USD ($)customer	Dec. 31, 2014USD ($)customer
Segment Reporting Information [Line Items]
Net sales	$ 501,627	$ 516,090	$ 521,807	$ 509,927	$ 479,622	$ 540,933	$ 560,709	$ 559,566	$ 2,049,451	$ 2,140,830	$ 2,335,405	[1]
Segment operating profit									362,690	356,720	362,720
Corporate, general, and administrative expenses									(161,112)	(164,082)	(163,520)
Interest and financing expenses, net									(16,785)	(14,652)	(16,567)
Other income (expense), net									(3,660)	(2,904)	(7,300)
Income before income tax expense									$ 343,208	$ 338,971	$ 339,099
Number of customers that exceeded threshold percentage | customer									0	0	1
Shell [Member] | Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Net sales											$ 261,000
Sales [Member] | Shell [Member]
Segment Reporting Information [Line Items]
Percentage of consolidated net sales											11.00%
Operating Segments [Member]
Segment Reporting Information [Line Items]
Segment operating profit									$ 385,436	$ 379,306	$ 386,363
Operating Segments [Member] | Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Net sales									2,034,645	2,124,995	2,325,082
Segment operating profit									384,906	374,934	385,084
Operating Segments [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Net sales									14,806	15,835	10,323
Segment operating profit									530	4,372	1,279
Operating Segments [Member] | Lubricant additives [Member] | Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Net sales									1,672,523	1,740,956	1,901,279
Operating Segments [Member] | Fuel additives [Member] | Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Net sales									362,122	384,039	423,803
Corporate [Member]
Segment Reporting Information [Line Items]
Corporate, general, and administrative expenses									$ (21,783)	$ (22,779)	$ (23,397)
[1]	Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014. Sales to Shell amounted $261 million (11% of consolidated net sales) in 2014. These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.

Segment and Geographic Area I98

Segment and Geographic Area Information (Schedule Of Asset Information By Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 1,416,436	$ 1,286,249
Cash and cash equivalents	192,154	93,424	$ 103,003	$ 238,703
Trade and other accounts receivable, net	306,916	287,967
Deferred income taxes	29,063	44,729
Net property, plant, and equipment	503,745	402,446
Prepaid pension cost	25,800	20,430
Deferred charges and other assets	10,509	39,345
Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Total assets	1,083,585	1,011,047
All Other [Member]
Segment Reporting Information [Line Items]
Total assets	16,019	14,324
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total assets	1,099,604	1,025,371
Corporate [Member]
Segment Reporting Information [Line Items]
Trade and other accounts receivable, net	7,547	4,184
Prepaid expenses and other current assets	26,301	35,370
Net property, plant, and equipment	29,870	29,640
Deferred charges and other assets	$ 6,097	$ 33,101

Segment and Geographic Area I99

Segment and Geographic Area Information (Schedule of Additions to Long-lived Assets and Depreciation and Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Additions to long-lived assets	$ 147,684	$ 126,499	$ 59,716
Depreciation and amortization	44,893	42,265	41,538
Petroleum Additives [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets	145,768	124,605	57,065
Depreciation and amortization	42,128	39,365	38,844
All Other [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets	21	22	0
Depreciation and amortization	15	12	27
Corporate [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets	1,895	1,872	2,651
Depreciation and amortization	$ 2,750	$ 2,888	$ 2,667

Segment and Geographic Area 100

Segment and Geographic Area Information (Schedule of Net Sales by Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 501,627	$ 516,090	$ 521,807	$ 509,927	$ 479,622	$ 540,933	$ 560,709	$ 559,566	$ 2,049,451	$ 2,140,830	$ 2,335,405	[1]
Total assets	1,416,436				1,286,249				1,416,436	1,286,249
Long-lived assets	503,745				402,446				503,745	402,446
United States [Member]
Segment Reporting Information [Line Items]
Net sales									701,209	775,591	810,766
Total assets	539,792				581,549				539,792	581,549
Long-lived assets	224,790				197,724				224,790	197,724
Singapore [Member]
Segment Reporting Information [Line Items]
Long-lived assets	189,485				113,219				189,485	113,219
Foreign [Member]
Segment Reporting Information [Line Items]
Total assets	876,644				704,700				876,644	704,700
Europe, Middle East, Africa, India [Member]
Segment Reporting Information [Line Items]
Net sales									653,341	669,198	783,988
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									470,616	436,396	471,508
Other foreign [Member]
Segment Reporting Information [Line Items]
Net sales									224,285	259,645	$ 269,143
Long-lived assets	$ 89,470				$ 91,503				$ 89,470	$ 91,503
[1]	Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014. Sales to Shell amounted $261 million (11% of consolidated net sales) in 2014. These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.

Selected Quarterly Consolida101

Selected Quarterly Consolidated Financial Data (unaudited) (Schedule Of Selected Quarterly Consolidated Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Selected Quarterly Financial Information [Abstract]
Net sales	$ 501,627	$ 516,090	$ 521,807	$ 509,927	$ 479,622	$ 540,933	$ 560,709	$ 559,566	$ 2,049,451	$ 2,140,830	$ 2,335,405	[1]
Gross profit	149,410	177,401	178,400	175,550	153,305	174,771	169,708	181,272	680,761	679,056	665,423
Net income	$ 45,672	$ 71,449	$ 64,389	$ 61,931	$ 53,914	$ 62,009	$ 58,733	$ 63,947	$ 243,441	$ 238,603	$ 233,255
Earnings per share - basic and diluted (in dollars per share)	$ 3.86	$ 6.03	$ 5.43	$ 5.22	$ 4.50	$ 5.08	$ 4.72	$ 5.14	$ 20.54	$ 19.45	$ 18.38
[1]	Net sales to one customer of our petroleum additives segment exceeded 10% of consolidated net sales in 2014. Sales to Shell amounted $261 million (11% of consolidated net sales) in 2014. These sales represented a wide range of products sold to multiple Shell affiliates around the world. No customer exceeded 10% of net sales in 2016 or 2015.

Recent Accounting Pronouncem102

Recent Accounting Pronouncements (Narrative) (Details) $ in Millions	Dec. 31, 2015USD ($)
ASU 2015-03 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU 2015-03 reduction of Deferred charges and other assets and Long-term debt	$ (3.6)
ASU 2015-17 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adoption of ASU 2015-17 current deferred income taxes reclassified to non-current	$ 6.4